Colorado County Codes

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Starting in 1958, Colorado plates were issued beginning with a two-alpha county code designation. In the mid-1980s, most counties began exhausing their two-alpha combinations and switched to ABC-123 format plates, with the alpha portion again allocated by county. This system was in place through the end of 1999, when county coding was discontinued. A listing of the two- and three-digit county codes follows, sorted by county name:

County Two-Digit Code Three-Digit Code
Adams TE-UF, GA-GG SAA-TZZ
Alamosa XE-XG EAA-EBD
Arapahoe PH-RP, FA-FG PAA-RZZ
Archuleta YU FAA-FAL
Baca WG EBE-EBW
Bent XC EBX-ECL
Boulder ML-NF, FH-FP MAA-NZZ
Chaffee XH-XK FAM-FCC
Cheyenne YR ECM-ECT
Clear Creek YY-YZ ECU-EDU
Conejos WS EDV-EEK
Costilla YA EEL-EES
Crowley XW-XX EET-EFA
Custer ZA EFB-EFG
Delta VL-VN  
Denver AA-CV AAA-DZZ
Dolores ZH EHR-EHV
Douglas YS-YT EHW-EMA
Eagle YM-YN EMB-EPA
El Paso JX-LL, FR-FT, FV KAA-LZZ
Elbert XS-XT EPB-EPU
Fremont UP-UT EPV-ETV
Garfield WM-WR ETM-ETW
Gilpin ZK EWN-EWV
Grand ZB-ZC EWZ-EYB
Gunnison YD-YE EYC-EZC
Hinsdale ZN EZD-EZE
Huerfano VE EZF-EZW
Jackson ZJ FGC-FGH
Jefferson RS-TD, HG-HW GAA-JZZ
Kiowa YP WUS-WUY
Kit Carson WU-WV WUZ-WVV
 
County Two-Digit Code Three-Digit Code
La Plata VV-VY FDF-FGB
Lake YF-YH FCD-FDE
Larimer LU-MK, FX-FY FHA-FZZ
Las Animas LM-LN UAA-UBK
Lincoln XP-XR UBL-UCA
Logan UG-UJ UCB-UEH
Mesa NG-NT UEJ-UNL
Mineral ZM UNM-UNR
Moffat YJ-YK UNS-UPX
Montezuma XL-XN UPY-USL
Montrose WB-WD USM-UUZ
Morgan UW-UY UVA-UXR
Otero PA-PC UXS-UZZ
Ouray ZF VAA-VAG
Park ZD VAH-VBA
Phillips XY-XZ VBB-VBR
Pitkin ZG-ZP VBS-VDM
Prowers VG-VH VDN-VEY
Pueblo GP-HD VEC-VVC
Rio Blanco YV-YW VVD-VVV
Rio Grande WJ-WL VVW-VWZ
Routt WZ-XA VXA-VYN
Saguache XU-XV VYP-VZA
San Juan ZE VZB-VZE
San Miguel YX VZF-VZR
Sedgwick YB-YC WNL-WNY
Summit ZL, ZR WNZ-WRM
Teller YL WRN-WSR
Washington WW WST-WTK
Weld HY-JM WAA-WNK
Yuma VS-VT WTL-WUR
Rental Car/Overflow n/a ZAA-ZZZ

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© Copyright 1998-2014 David Nicholson. All Rights Reserved.

Last Modified 12/11/2005 (added rental codes).