License Plates by Colorado County
| COUNTY NUMBER | ALPHABETICAL PLATE DESIGNATION | COUNTY NAME |
| 01 | AA thru EZ | DENVER |
| 02 | GP thru HX | PUEBLO |
| 03 | HY thru JW | WELD |
| 04 | JX thru LL | EL PASO |
| 05 | LM thru LT | LAS ANIMAS |
| 06 | LU thru MK | LARIMER |
| 07 | ML thru NF-FH thru FP | BOULDER |
| 08 | NH thru NZ | MESA |
| 09 | PA thru PG | OTERO |
| 10 | PH thru RP-FA thru FG | ARAPAHOE |
| 11 | RS thru TD-HG thru HX | JEFFERSON |
| 12 | TE thru UF-GA thru GL | ADAMS |
| 13 | UG thru UN | LOGAN |
| 14 | UP thru UV | FREMONT |
| 15 | UW thru VD | MORGAN |
| 16 | VE thru VF | HUERFANO |
| 17 | VG thru VK | PROWERS |
| 18 | VL thru VR | DELTA |
| 19 | VS thru VU | YUMA |
| 20 | VV thru WA | LA PLATA |
| 21 | WB thru WF | MONTROSE |
| 22 | WG thru WH | BACA |
| 23 | WJ thru WL | RIO GRANDE |
| 24 | WM thru WR | GARFIELD |
| 25 | WS thru WT | CONEJOS |
| 26 | WU thru WV | KIT CARSON |
| 27 | WW thru WY | WASHINGTON |
| 28 | WZ thru XB | ROUTT |
| 29 | XC thru XD | BENT |
| 30 | XE thru XG | ALAMOSA |
| 31 | XH thru XH | CHAFFEE |
| 32 | XL thru XN | MONTEZUMA |
| 33 | XP thru XR | LINCOLN |
| 34 | XS thru XT | ELBERT |
| 35 | XU thru XV | SAGUACHE |
| 36 | XW thru XX | CROWLEY |
| 37 | XY thru XZ | PHILLIPS |
| 38 | YA thru YA | COSTILLA |
| 39 | YB thru YC | SEDGWICK |
| 40 | YD thru YE | GUNNISON |
| 41 | YF thru YH | LAKE |
| 42 | YJ thru YK | MOFFAT |
| 43 | YL thru YL | TELLER |
| 44 | YM thru YN | EAGLE |
| 45 | YP thru YP | KIOWA |
| 46 | YR thru YR | CHEYENNE |
| 47 | YS thru YT – GM thru GN | DOUGLAS |
| 48 | YU thru YU | ARCHULETA |
| 49 | YV thru YW | RIO BLANCO |
| 50 | YX thru YX | SAN MIGUEL |
| 51 | YY thu YZ | CLEAR CREEK |
| 52 | ZA thru ZA | CUSTER |
| 53 | ZB thru ZC | GRAND |
| 54 | ZD thru ZD | PARK |
| 55 | ZE thru ZE | SAN JUAN |
| 56 | ZF thru ZF | OURAY |
| 57 | ZG thru ZG & ZS | PITKIN |
| 58 | ZH thru ZH | DOLORES |
| 59 | ZJ thru ZJ | JACKSON |
| 60 | ZK thru ZK | GILPIN |
| 61 | ZL thru ZL & ZR | SUMMIT |
| 62 | ZM thru ZM | MINERAL |
| 63 | ZN thru ZN | HINSDALE |