Colin McGregor
License Plate Collector | ALPCA 11808
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    Comprehensive Colorado county codes/allotments list

    There exist many resources that display incomplete and/or inaccurate Colorado county code/allotment data. This webpage is designed to be a public record of Colorado license plate county information that pulls from all known sources. It should be used instead of the list found in the ALPCA archives, which is not complete and contains many errors.

    Most of the information here comes from Colorado License Plates: The First 100 Years by Tom Boyd, George Sammeth, and Jim Hucks, which is an excellent and comprehensive book detailing the history, minutia, and oddities of Colorado license plates through 2013. In the list below, however, you will find a few corrections and additional pieces of information not found in the book that come from the independent research of Colin McGregor (me) and Bennett Sizer.

    1916-1931

    These codes only apply to passenger license plates -- if the plate has a letter in the serial, it's some sort of nonpassenger plate, and no county allotments for pre-1932 nonpassenger Colorado license plates are known.

    Note that county allotments are not known definitively for the following years: 1913-1915, 1918, 1921, and 1928-1930. HOWEVER, on some of these years for which allotments are unknown, I have done some research using plate numbers for which I am absolutely certain about the county of issuance. While these formulas are by no means perfect, I have been able to approximate the following:

    COUNTY 1916 1917 1919-1920 1922
    DENVER 1-12000 1-15000 1 - 33-000 1 - 40-000
    EL PASO 15001-17500 15001-18000 50-001 - 57-000 50-001 - 60-000
    DELTA 17501-18000 36176-36600 135-001 - 136-500 108-001 - 109-700
    LARIMER 18001-19700 19001-21200 167-001 - 172-000 134-001 - 140-000
    ADAMS 19701-20000 18401-19000 101-001 - 102-800 80-001 - 82-700
    WELD 20001-22300 21201-24600 80-001 - 88-000 67-501 - 79-000
    BOULDER 22301-23750 24601-26600 116-001 - 121-000 94-001 - 100-800
    CLEAR CREEK 23751-23800 34451-34600 128-001 - 128-400 103-701 - 103-900
    DOUGLAS 23801-24000 31801-32100 138-001 - 138-600 110-601 - 111-600
    ARAPAHOE 24001-24500 31201-31800 106-001 - 107-300 85-501 - 88-500
    CHAFFEE 24501-24800 45976-46375 125-001 - 125-800 101-501 - 102-350
    EAGLE 24801-24900 34801-34950 140-001 - 140 -300 112-201 - 112-550
    GRAND 24901-25000 37301-37400 149-001 - 149-250 119-901 - 120-150
    ELBERT 25001-25200 32101-32500 141-001 - 141-900 112-801 - 113-900
    GARFIELD 25201-25500 34951-35400 146-001 - 147-000 118-001 - 119-200
    JEFFERSON 25501-25975 33701-34400 156-001 - 158-000 124-601 - 127-600
    JACKSON 25976-26050 37201-37300 155-001 - 155-250 124-101 - 124-400
    LAKE 26051-26200 34601-34800 164-001 - 164-500 132-101 - 132-400
    LINCOLN 26201-26400 32501-33000 180-001 - 181-000 145-001 - 146-400
    LOGAN 26401-26950 27701-28900 182-001 - 184-500 147-001 - 151-600
    MESA 26951-27500 35476-36175 186-001 - 187-800 152-501 - 155-300
    PHILLIPS 27501-27800 29151-29700 207-001 - 208-250 171-001 - 173-000
    PITKIN 27801-27850 35401-35475 209-001 - 209-300 173-701 - 173-875
    RIO BLANCO 27851-28000 36601-36750 212-001 - 212-300 177-001 - 177-500
    MORGAN 28001-28550 26601-27700 195-001 - 198-000 160-101 - 164-100
    GILPIN 28551-28570 34401-34450 148-001 - 148-250 119-701 - 119-775
    YUMA 28571-28940 30301-31200 230-001 - 232-500 190-201 - 193-900
    MOFFAT 28941-29020 36751-36900 190-001 - 190-400 156-201 - 156-800
    ROUTT 29021-29095 36901-37200 216-001 - 216-600 180-001 - 180-900
    SEDGWICK 29096-29245 28901-29150 220-001 - 222-000 183-101 - 184-100
    WASHINGTON 29246-29515 29701-30300 226-001 - 227-700 186-501 - 189-500
    TELLER 29516-29840 18001-18400 223-001 - 223-750 185-801 - 186-300
    ARCHULETA 29841-29900 47941-48050 110-001 - 110-300 89-001 - 89-250
    PARK 29901-29960 49751-49900 206-001 - 206-300 170-501 - 170-750
    SUMMIT 29961-30000 49901-50000 222-001 - 222-220 185-601 - 185-700
    PUEBLO 30001-32000 37401-39900 70-001 - 75-000 60-001 - 66-500
    LAS ANIMAS 32001-32700 40301-41500 176-001 - 178-500 140-501 - 144-300
    BENT 32701-33000 43001-43500 113-001 - 114-300 91-501 - 93-300
    FREMONT 38001-38600 45176-45975 143-001 - 145-000 114-501 - 117-200
    COSTILLA 38601-38700 48351-48500 131-001 - 131-400 104-801 - 105-200
    HUERFANO 38701-39000 39901-40300 153-001 - 154-000 121-401 - 123-500
    OTERO 39901-39600 41501-42700 200-001 - 202-600 165-001 - 169-500
    RIO GRANDE 39601-39950 48901-49400 213-001 - 214-200 177-701 - 179-450
    CUSTER 39951-39980 45101-45175 134-001 - 134-150 107-501 - 107-700
    MINERAL 39981-40000 49401-49450 189-001 - 189-150 156-001 - 156-075
    PROWERS 40001-40600 43501-44500 210-001 - 210-800 174-001 - 176-500
    GUNNISON 40601-40780 46376-46600 150-001 - 150-500 120-401 - 121-000
    KIT CARSON 40781-41000 33001-33500 162-001 - 163-300 129-501 - 131-600
    MONTROSE 41001-41390 46601-47150 192-001 - 193-200 157-801 - 159-600
    BACA 41391-41500 44801-45100 111-001 - 111-900 89-501 - 90-750
    ALAMOSA 41501-41750 48501-48900 104-001 - 104-900 83-501 - 84-600
    SAGUACHE 41751-42000 49451-49750 217-001 - 217-500 181-201 - 182-000
    CROWLEY 42001-42200 42701-43000 132-001 - 132-900 106-001 - 107-000
    LA PLATA 42201-42400 47641-47940 165-001 - 166-000 132-501 - 133-600
    MONTEZUMA 42401-42500 47441-47640 191-001 - 191-500 157-001 - 157-600
    OURAY 42501-42600 47151-47250 205-001 - 205-250 170-201 - 170-400
    KIOWA 42601-42700 44501-44800 160-001 - 161-200 128-501 - 129-250
    CONEJOS 42701-42830 48051-48350 129-001 - 129-600 104-001 - 104-500
    SAN MIGUEL 42831-42900 47251-47400 219-001 - 219-250 186-601 - 182-925
    CHEYENNE 42901-42975 33501-33700 127-001 - 127-500 102-701 - 103-400
    HINSDALE 42976-42990 47426-47440 152-001 - 152-200 121-301 - 121-330
    SAN JUAN 42992-43000 47401-47425 218-001 - 218-150 182-401 - 182-500
    DOLORES none none none 110-501 - 110-530


    COUNTY 1923 1924 1925 1926 1927 1931
    ADAMS 88-501 - 92-000 100-001 - 104-500 111-501 - 116-500 118-001 - 124-000 150-001 - 157-000 175-001 - 182-000
    ALAMOSA 92-501 - 93-700 105-001 - 106-500 117-001 - 118-500 124-501 - 126-500 158-001 - 159-800 185-001 - 187-500
    ARAPAHOE 94-001 - 97-000 107-001 - 111-200 119-101 - 123-600 126-801 - 131-800 160-301 - 166-300 190-001 - 197-700
    ARCHULETA 97-501 - 97-800 111-501 - 112-000 124-101 - 124-500 132-301 - 132-700 167-301 - 167-800 200-001 - 200-600
    BACA 98-001 - 99-400 112-501 - 114-500 124-701 - 126-700 132-901 - 135-100 167-901 - 169-900 201-001 - 204-000
    BENT 99-601 - 101-500 115-001 - 117-600 127-201 - 129-300 135-401 - 137-700 170-001 - 173-300 205-001 - 207-500
    BOULDER 101-801 - 108-600 118-001 - 125-800 129-801 - 138-800 138-001 - 147-500 173-501 - 184-000 208-001 - 220-550
    CHAFFEE 109-001 - 110-000 127-001 - 128-500 139-801 - 141 -400 148-001 - 149-800 185-001 - 186-500 221-001 - 223-200
    CHEYENNE 110-201 - 111-000 129-001 - 130-400 141-901 - 143-300 150-101 - 151-600 186-801 - 188-000 224-001 - 225-100
    CLEAR CREEK 111-201 - 111-500 137-001 - 131-500 143-601 - 144-200 151-901 - 152-600 188-201 - 188-800 226-001 - 226-800
    CONEJOS 111-601 - 112-400 131-801 - 132-800 144-401 - 145-600 152-801 - 154-100 188-901 - 190-200 227-001 - 228-700
    COSTILLA 112-601 - 113-050 132-801 - 133-500 145-901 - 146-700 154-301 - 155-200 190-401 - 191-000 229-001 - 230-000
    CROWLEY 113-201 - 114-300 133-801 - 135-800 147-001 - 149-000 155-401 - 157-600 191-101 - 192-500 231-001 - 232-800
    CUSTER 114-501 - 114-700 136-001 - 136-500 149-501 - 150-100 157-901 - 158-600 192-701 - 193-300 233-001 - 233-800
    DELTA 114-801 - 116-700 136-801 - 139-500 150-401 - 153-900 158-801 - 162-300 193-351 - 196-850 234-001 - 238-600
    DENVER 1 - 45-000 1 - 55-000 1 - 65-000 1 - 70-000 1 - 75-000 1 - 90-000
    DOLORES 116-901 - 116-950 140-501 - 140-600 154-401 - 154-550 162-801 - 162-950 197-251 - 197-400 239-001 - 239-400
    DOUGLAS 117-001 - 118-000 140-701 - 142-100 154-701 - 156-200 163-101 - 164-700 197-401 - 198-600 240-001 - 241-600
    EAGLE 118-301 - 118-650 142-401 - 143-000 156-701 - 157-400 164-901 - 165-600 198-801 - 199-500 242-001 - 243-000
    ELBERT 118-801 - 120-100 143-101 - 145-100 157-701 - 150-900 165-801 - 168-000 199-601 - 201-400 244-001 - 246-200
    EL PASO 50-001 - 60-000 55-001 - 65-600 70-001 - 82-000 75-001 - 88-000 100-001 - 114-000 100-001 - 117-000
    FREMONT 120-501 - 123-500 145-501 - 149-700 160-401 - 165-200 168-301 - 173-300 201-601 - 206-800 247-001 - 252-500
    GARFIELD 123-701 - 125-000 150-201 - 152-200 165-701 - 167-900 173-801 - 176-000 207-201 - 208-900 254-001 - 256-600
    GILPIN 125-301 - 125-400 153-001 - 153-200 168-401 - 168-650 176-301 - 176-550 209-201 - 209-450 257-001 - 257-600
    GRAND 125-501 - 125-850 153-501 - 154-000 168-801 - 169-400 176-701 - 177-400 209-501 - 210-200 258-001 - 258-850
    GUNNISON 126-001 - 126-700 154-301 - 155-300 169-701 - 170-900 177-601 - 178-900 210-251 - 211-350 259-001 - 260-350
    HINSDALE 126-901 - 126-950 155-401 - 155-500 171-401 - 171-550 179-101 - 179-250 211-401 - 211-500 261-001 - 261-100
    HUERFANO 127-001 - 129-100 155-601 - 158-900 171-701 - 175-300 179-401 - 183-100 211-501 - 214-800 262-001 - 265-800
    JACKSON 129-401 - 129-700 159-601 - 160-100 175-801 - 176-400 183-401 - 184-000 215-201 - 215-700 266-001 - 266-600
    JEFFERSON 129-801 - 133-000 160-501 - 165-000 176-701 - 182-200 184-201 - 189-900 215-701 - 222-000 267-001 - 275-000
    KIOWA 133-301 - 134-150 166-001 - 167-300 183-001 - 184-500 190-401 - 191-900 223-001 - 224-200 276-001 - 277-100
    KIT CARSON 134-301 - 136-400 167-801 - 170-400 185-001 - 188-000 192-101 - 195-100 224-401 - 227-200 278-001 - 281-000
    LAKE 136-601 - 136-950 170-801 - 171-400 188-501 - 189-200 195-401 - 196-200 227-301 - 228-000 282-001 - 283-100
    LA PLATA 137-001 - 138-200 171-701 - 173-400 189-501 - 191-400 196-401 - 198-400 228-051 - 230-050 284-001 - 287-000
    LARIMER 80-501 - 88-000 91-001 - 98-500 191-901 - 200-900 198-701 - 208-200 230-201 - 242-200 288-001 - 299-500
    LAS ANIMAS 138-501 - 142-500 174-001 - 179-600 201-901 - 208-400 208-701 - 215-700 243-201 - 249-700 300-001 - 307-850
    LINCOLN 142-901 - 144-500 181-001 - 183-300 209-401 - 211-900 216-201 - 218-700 250-201 - 252-200 308-001 - 310-500
    LOGAN 144-801 - 149-400 184-001 - 188-600 212-401 - 217-000 219-001 - 223-800 252-401 - 257-600 311-001 - 317-500
    MESA 149-701 - 152-700 189-501 - 194-000 217-801 - 222-800 224-201 - 229-500 258-201 - 264-200 318-001 - 325-500
    MINERAL 153-101 - 153-200 194-101 - 194-300 223-801 - 224-000 230-001 - 230-200 265-201 - 265-350 326-001 - 326-250
    MOFFAT 153-301 - 153-900 194-401 - 195-300 224-201 - 225-300 230-401 - 231-500 265-401 - 266-400 327-001 - 328-500
    MONTEZUMA 154-001 - 154-650 195-801 - 196-700 225-601 - 226-800 231-701 - 232-900 266-501 - 267-700 329-001 - 331-000
    MONTROSE 154-801 - 156-700 197-001 - 199-500 227-101 - 229-600 233-101 - 235-600 267-751 - 270-250 332-001 - 335-000
    MORGAN 157-001 - 161-000 200-501 - 204-900 230-101 - 234-600 235-901 - 240-600 270-501 - 275-500 336-001 - 342-000
    OTERO 161-201 - 165-700 206-001 - 211-000 235-601 - 241-100 241-101 - 246-900 276-201 - 282-200 343-001 - 349-500
    OURAY 166-001 - 166-250 211-801 - 212-200 242-101 - 242-600 247-501 - 248-000 282-701 - 283-000 350-001 - 340-450
    PARK 166-401 - 166-750 212-301 - 212-900 242-901 - 243-700 248-201 - 249-100 283-051 - 283-650 351-001 - 351-700
    PHILLIPS 166-901 - 169-000 213-101 - 215-500 244-001 - 246-600 249-301 - 252-100 283-701 - 286-000 352-001 - 354-500
    PITKIN 169-201 - 169-400 216-001 - 216-300 247-101 - 247-450 252-401 - 252-800 286-151 - 286-450 355-001 - 355-400
    PROWERS 169-501 - 172-100 216-401 - 219-600 247-701 - 251-300 253-001 - 256-800 286-501 - 290-000 356-001 - 361-000
    PUEBLO 60-001 - 67-500 66-001 - 75-100 83-501 - 94-500 89-001 - 101-000 115-001 - 129-001 125-001 - 142-000
    RIO BLANCO 172-401 - 172-900 220-301 - 220-900 252-101 - 252-800 257-201 - 258-000 290-501 - 291-100 362-001 - 362-800
    RIO GRANDE 173-001 - 174-750 221-501 - 223-700 253-101 - 255-600 258-201 - 260-800 291-151 - 293-650 363-001 - 365-800
    ROUTT 175-001 - 176-000 224-001 - 225-500 256-101 - 257-900 261-101 - 263-000 293-801 - 295-600 366-001 - 368-300
    SAGUACHE 176-301 - 177-150 225-901 - 227-100 258-401 - 259-900 263-301 - 264-900 295-651 - 296-650 369-001 - 371-000
    SAN JUAN 177-401 - 177-500 227-601 - 227-750 260-401 - 260-600 265-101 - 265-300 296-701 - 296-850 372-001 - 372-300
    SAN MIGUEL 177-601 - 177-950 227-801 - 228-300 260-901 - 261-500 265-501 - 266-200 296-901 - 297-500 373-001 - 373-800
    SEDGWICK 178-101 - 179-200 228-801 - 230-300 261-801 - 263-400 266-401 - 268-100 297-551 - 299-050 374-001 - 378-100
    SUMMIT 179-501 - 179-650 231-001 - 231-300 263-901 - 264-300 268-301 - 268-800 299-201 - 299-500 379-001 - 379-400
    TELLER 179-801 - 180-400 231-601 - 232-800 264-601 - 266-000 269-001 - 270-500 299-551 - 300-750 380-001 - 381-250
    WASHINGTON 180-601 - 183-600 233-001 - 236-200 266-501 - 270-000 270-701 - 274-200 300-901 - 303-900 382-001 - 384-750
    WELD 68-301 - 79-800 77-001 - 89-600 96-001 - 110-000 102-001 - 117-000 130-001 - 148-000 150-001 - 170-000
    YUMA 184-001 - 187-000 237-301 - 240-800 270-501 - 274-500 274-601 - 278-800 304-101 - 308-150 385-001 - 389-000

    1932-2000

    NOTE: Counties were assigned blocks of letters, but many counties never used their full assignment; others exhausted theirs and
    borrowed from other series. The table below reflects actual use and not initial assignment.

    1932-58 1959-82 1982-92 1992-2000 County Name
    1 AA-CV AAA-BMJ AAA-ADN DENVER
    2 GP-HD VEZ-VPA VEZ-VFN PUEBLO
    3 HY-JM WAA-WME WAA-WAY WELD
    4 JX-LL, FR-FT, FV KAA-LGR KAA-KCL EL PASO
    5 LM-LN UAA-UAV UAA-UAB LAS ANIMAS
    6 LU-MK, FX-FY (MC '76 only) FHA-FXT FHA-FHY LARIMER
    7 ML-NF, FH-FP MAA-MSZ MAA-MBF BOULDER
    8 NG-NT (NG '59 only, NU/NW cycle only) UEJ-ULV UEJ-UFG MESA
    9 PA-PC UXS-UYW UXS-UXU OTERO
    10 PH-RP, FA-FG PAA-RHD PAA-PCF ARAPAHOE
    11 RS-TD, HG-HW GAA-HKU GAA-GCF JEFFERSON
    12 TE-UF, GA-GG SAA-SZF SAA-SBM ADAMS
    13 UG-UJ UCB-UDE UCB-UCC LOGAN
    14 UP-UT EPV-ESU EPV-EPZ FREMONT
    15 UW-UY UVA-UWJ UVA-UVD MORGAN
    16 VE EZF-EZT EZF HUERFANO
    17 VG-VH VDN-VEJ VDN-VDO PROWERS
    18 VL-VN EFH-EGZ EFH-EFI DELTA
    19 VS-VT WTL-WTZ WTL YUMA
    20 VV-VY FDF-FFL FDF-FDJ LA PLATA
    21 WB-WD USM-UUD USM-USO MONTROSE
    22 WG EBE-EBK EBE BACA
    23 WJ-WK VVW-VWS VVW-VVX RIO GRANDE
    24 WM-WR ETW-EWB ETW-EUA GARFIELD
    25 WS EDV-EED EDV CONEJOS
    26 WU (WV '59 only) WUZ-WVJ WUZ KIT CARSON
    27 WW WST-WTA WST WASHINGTON
    28 WZ-XA (XB cycles only) VXA-VXY VXA-VXC ROUTT
    29 XC EBX-ECF EBX BENT
    30 XE-XF EAA-EAT EAA-EAB ALAMOSA
    31 XH-XJ FAM-FBP FAM-FAN CHAFFEE
    32 XL-XM UPY-USE UPY-URA MONTEZUMA
    33 XP UBL-UBU UBL LINCOLN
    34 XS EPB-EPU, DKA-DKC EPB-EPC ELBERT
    35 XU VYP-VYX VYP SAGUACHE
    36 XW EET-EEZ EET CROWLEY
    37 XY VBB-VBG VBB PHILLIPS
    38 YA EEL-EES EEL COSTILLA
    39 YB WNL-WNR WNL SEDGWICK
    40 YD-YE EYC-EYU EYC-EYD GUNNISON
    41 YF-YG FCD-FCV FCD-FCE LAKE
    42 YJ-YK UNS-UPG UNS-UNT MOFFAT
    43 YL WRN-WSS, VZS-VZV WRN-WRS TELLER
    44 YM-YN, ZT EMB-EPA EMB-EMI EAGLE
    45 YP WUS-WUU WUS KIOWA
    46 YR ECM-ECR ECM-ECT CHEYENNE
    47 YS-YT, GM EHW-EMA, FGJ-FGZ
    VZZ, WVW-WWF, DAA-DAU    		 EHW-EIG DOUGLAS
    48 YU FAA-FAL FAA-FAB ARCHULETA
    49 YV VVE-VVP VVE RIO BLANCO
    50 YX VZF-VZM VZF SAN MIGUEL
    51 YY-YZ ECU-EDP ECU-ECV CLEAR CREEK
    52 ZA EFB-EFE EFB CUSTER
    53 ZB-ZC EWZ-EXV EWZ-EXA GRAND
    54 ZD VAH-VBA, EWW, EZX-EZZ,
    VZX-VZY, WWG-WWJ    		 VAH-VAI PARK
    55 ZE VZB-VZC VZB SAN JUAN
    56 ZF VAA-VAE VAA OURAY
    57 ZG, ZP VBS-VCY VBS-VBT PITKIN
    58 ZH EHR-EHT EHR DOLORES
    59 ZJ FGC-FGE FGC JACKSON
    60 ZK EWN-EWV EWN GILPIN
    61 ZL, ZR WNZ-WRJ WNZ-WPC SUMMIT
    62 ZM UNM-UNN UNM MINERAL
    63 ZN EZD-EZE EZD HINSDALE

    1977-2000 Anomalies

    Rental car series (Denver):

    Rental car series (outside Denver):

    Rental car series (all counties):

    BHM was used on unmarked police cars on 1982 and 1992 baseplates

    EHH on the 1992 base was issued in four counties: Denver, Eagle, Garfield, and Logan

    Known 1982 truck overflow codes:

    1982-Base Motorcycle and Trailer Codes/Allotments

    Note 1: 1992-base trailer plates use the same allotments as below but with a leading 0, 1, or 2 after the letter (e.g. the first 1992-base trailer plate from Grand County would have been F030001. When this allotment ran out, they'd start again at F130001).

    Note 2: These are the trailer series' initial allotments. Some counties exceeded these before 1992 and were given extra plates from other counties' series. The details of these overflow series are not available, though it is known that Larimer County issued trailer plates in the C30001+ series, and Park County was issued P68001 - P70000.

    COUNTY MOTORCYCLES TRAILERS
    ADAMS TE-UF, DA-DS A00001 - A99999
    ALAMOSA XE-XG B00001 - B07000
    ARAPAHOE PG-RR, DT-DZ B07001 - B80000
    ARCHULETA YU B80001 - B83000
    BACA WG-WH B83001 - B88500
    BENT XC B88501 - B91500
    BOULDER ML-NF, CT-CZ, FL-FZ M 00,001-55,000
    CHAFFEE XH-XK B91501 - B99999
    CHEYENNE YR C 00,001-03,000
    CLEAR CREEK YY-YZ C 03,001-07,000
    CONEJOS WS-WT C 07,001-11,000
    COSTILLA YA C 11,001-12,000
    CROWLEY XW C 12,001-14,000
    CUSTER ZA C 14,001-16,000
    DELTA VL-VR C 16,001-30,000
    DENVER AA-CN D 00,001-80,000
    DOLORES ZH D 80,001-82,000
    DOUGLAS YS-YT, CP-CS D 82,001-99,999
    EAGLE YM-YN, XX-XY E 80,001-90,000
    ELBERT XS-XT E 90,001-99,999
    EL PASO JX-LL, GA-GN E 00,001-80,000
    FREMONT UP-UW F 00,001-15,000
    GARFIELD WM-WR F 15,001-28,000
    GILPIN ZK F 28,001-30,000
    GRAND ZB-ZC F 30,001-38,000
    GUNNISON YD-YE F 38,001-44,000
    HINSDALE ZP F 44,001-45,000
    HUERFANO VE F 45,001-48,000
    JACKSON ZJ F 48,001-51,000
    JEFFERSON RS-TD, EA-FK J 00,001-99,999
    KIOWA YP K 00,001-02,000
    KIT CARSON WU-WV K 02,001-08,000
    LAKE YF-YG L 74,001-78,000
    LA PLATA VV-WA L 60,001-74,000
    LARIMER LR-MK L 00,001-60,000
    LAS ANIMAS LM-LP L 78,001-82,500
    LINCOLN XP L 82,501-86,500
    LOGAN UG-UL L 86,501-99,999
    MESA NH-NZ M 55,001-99,999
    MINERAL ZR K 08,001-08,100
    MOFFATT YJ-YK K 08,101-17,000
    MONTEZUMA XL-XN K 17,001-30,000
    MONTROSE WB-WF K 30,001-47,000
    MORGAN UX-VD K 47,001-59,000
    OTERO PA-PF K 59,001-69,000
    OURAY ZF K 69,001-70,500
    PARK ZD P 50,001-54,000
    PHILLIPS XZ P 54,001-57,500
    PITKIN ZG, UM-UN P 54,001-57,500
    PROWERS VG-VK P 62,001-68,000
    PUEBLO GP-HN P 00,001-50,000
    RIO BLANCO YV-YW R 00,001-06,000
    RIO GRANDE WJ-WL R 06,001-13,000
    ROUTT WZ-XB R 13,001-20,000
    SAGUACHE XV S 05,001-08,500
    SAN JUAN ZE S 08,501-09,000
    SAN MIGUEL YX S 09,001-11,000
    SEDGWICK YB-YC S 11,001-13,000
    SUMMIT ZL-ZN S 00,001-05,000
    TELLER YL, XY T 00,001-05,000
    WASHINGTON WW-WY W 50,001-55,000
    WELD HY-JW W 00,001-50,000
    YUMA VS-VU Y 00,001-07,000

    COLORADO DESIGNER & DENIM CAR PLATES: 1989-2000

    Unless otherwise noted, the standard first-series 1977 code was used with a "1" in the middle (e.g. Huerfano, VE, would become V1E).

    COUNTY DESIGNER ISSUE 1989-92 DENIM ISSUE 1992-95
    ADAMS G1A, G2A, G3A, G4A, G4B, G4C, G4D, G4E, G4F G1A, G1B, G1C, G1D, G1E, G4G
    ARAPAHOE F1A, F2A, F3A, F4A, F5A, F6A, F6B, F6C, F6D, F6E, F6F, F6G, F6H, F6J, F6K, F6L, F6M F1A, F1B, F1C, F1D, F1E, F1F, F6P
    BOULDER F1H, F1J, F1K, F1L, F1M, F1N, F1P, F1S, F1T F1H, F1I, F1J, F1K, F1U
    DENVER A1A, A2A, A3A, A4A, A5A, A5B, A5C, A5D, A5E, A5F, A5G, A5H A1A, A1B, A1C, A1C, A1D, A1E, A1F, A1G, A5J
    DOUGLAS G1M, G1N, G2N, G2P G1M, G1N, G2P, Y1S
    EAGLE Y1M, Y1N Y1M, Y1N
    EL PASO J1X, J2X, J3X, J4X, J5X, J6X, J6Y, J6Z J1X, J1Y, J1Z, K1A, J2A, J2B
    JEFFERSON H1G, H2G, H3G, H4G, H5G, H6G, H7G, H8G, H8H, H8J, H8K, H8L, H8M, H8N, H8P, H8R, H8S, H8T H1G, H1H, H1I, H1J, H1K, H1L, H8X
    LARIMER L1U, L1V, L1W, L1X, L1Y, L1Z, L2A L1U, L1V, L1W, L2A
    MESA N1H, N1J, N1K N1H, N1I, N1L
    PROWERS V1G V1G, V1D
    PUEBLO G1P, G1R, G1S G2O, G1P, G1S
    SUMMIT Z1L, Z2L Z1L
    WELD H1Y, H2Y, H1Z, H2Z H1Y, H1Z, H2Z

    COUNTY CODE SUFFIXES FOR DESIGNER TRUCK PLATES

    1989 format: 1234-[suffix]; 1992 format: 12345[suffix]

    COUNTY NAME SUFFIX CODE COUNTY NAME SUFFIX CODE COUNTY NAME SUFFIX CODE
    DENVER A1 ADAMS C1 ARAPAHOE D1
    EL PASO F1 JEFFERSON G1 WELD H1
    ALAMOSA J1 ARCHULETA J2 BACA J3
    BENT J4 BOULDER J5 CHAFFEE K1
    CHEYENNE K2 CLEAR CREEK K3 CONEJOS K5
    COSTILLA K6 CROWLEY K7 CUSTER K8
    DELTA K9 DOLORES L1 DOUGLAS L2
    EAGLE L5 ELBERT L9 FREMONT M1
    GARFIELD M2 GILPIN M3 GRAND M4
    GUNNISON M5 HINSDALE M6 HUERFANO M7
    JACKSON M8 KIOWA M9 KIT CARSON N1
    LAKE N2 LA PLATA N3 LARIMER N4
    LAS ANIMAS P1 LINCOLN P2 LOGAN P3
    MESA P4 MINERAL P8 MOFFAT P9
    MONTEZUMA R1 MONTROSE R2 MORGAN R3
    OTERO R4 OURAY R5 PARK R6
    PHILLIPS R7 PITKIN R8 PROWERS S1
    PUEBLO S2 RIO BLANCO S4 RIO GRANDE S5
    ROUTT S6 SAGUACHE S7 SAN JUAN S8
    SAN MIGUEL S9 SEDGWICK T1 SUMMIT T2
    TELLER T5 WASHINGTON T6 YUMA T7