Colorado / CO-03
Colorado District 3
Score
Irregularity score 42 Middle of the packLess compact than 41% of other congressional districts.
252nd least compact of 429 nationally, 5th of 8 in Colorado.
A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work
The three measures
- Polsby-Popper
- 0.31at least as compact as 72% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.51at least as compact as 58% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.76at least as compact as 44% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.
Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.
The state's edge
49% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge
Cities and towns
The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.
- Pueblo cityall 111,876 residents
- Grand Junction cityall 65,560 residents
- Pueblo West communityall 33,086 residents
- Clifton communityall 20,413 residents
- Montrose cityall 20,291 residents
- Durango cityall 19,071 residents
- Fruita cityall 13,395 residents
- Rifle cityall 10,437 residents
- Glenwood Springs cityall 9,963 residents
- Alamosa cityall 9,806 residents
And 133 smaller places. 30% of this district's people live outside any city, town or named community. How places are counted
ZIP codes
155 ZIP codes have residents in this district. 19 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.
Show all 155 ZIP codes
- 80467 (1%)
- 80817 (1%)
- 81001
- 81003
- 81004
- 81005
- 81006
- 81007
- 81008 (99%)
- 81019
- 81020
- 81022
- 81023
- 81024
- 81025
- 81027
- 81030
- 81039 (97%)
- 81040
- 81046
- 81049
- 81050 (99%)
- 81054 (1%)
- 81055
- 81058 (93%)
- 81059
- 81064 (13%)
- 81067
- 81069 (96%)
- 81077
- 81081
- 81082
- 81089
- 81091
- 81101
- 81120 (98%)
- 81121
- 81122
- 81123
- 81124
- 81125
- 81126
- 81128
- 81129
- 81130
- 81131
- 81132
- 81133
- 81136
- 81137 (96%)
- 81138
- 81140
- 81141
- 81143
- 81144
- 81146
- 81147
- 81148
- 81149
- 81151
- 81152
- 81154
- 81155
- 81210
- 81220
- 81224
- 81225
- 81230
- 81235
- 81237
- 81239
- 81241
- 81243
- 81248
- 81253 (8%)
- 81301
- 81303
- 81320
- 81321
- 81323
- 81324 (97%)
- 81325
- 81326
- 81327
- 81328
- 81330
- 81331
- 81332
- 81334
- 81335
- 81401
- 81403
- 81410
- 81411
- 81413
- 81415
- 81416
- 81418
- 81419
- 81422
- 81423
- 81424
- 81425
- 81426
- 81427
- 81428
- 81429
- 81430
- 81431
- 81432
- 81433
- 81434
- 81435
- 81501
- 81503
- 81504
- 81505
- 81506
- 81507
- 81520
- 81521
- 81522
- 81523
- 81524
- 81525
- 81526
- 81527
- 81601
- 81610
- 81611
- 81612
- 81615
- 81621
- 81623
- 81624
- 81625 (99%)
- 81630
- 81631 (5%)
- 81632 (1%)
- 81633
- 81635
- 81637 (15%)
- 81638 (80%)
- 81640
- 81641
- 81642
- 81643
- 81646
- 81647
- 81648
- 81650
- 81652
- 81653 (16%)
- 81654
- 81656
These are the Census Bureau's ZIP code areas, which match residential ZIP codes closely. ZIP codes used only for PO boxes or a single organization aren't included. How ZIP codes are matched
2024 presidential vote
Shares of the votes for the two of them; other candidates are left out. Colorado used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from
U.S. House
The November 3, 2026 race hasn't been called yet.
Unofficial results from the Colorado Secretary of State, checked November 6, 2026. A race shows a winner once news decision desks have called it. Results become official when the state certifies them. Where this comes from
Colorado's senators
- Michael F. Bennet, Democrat
- John W. Hickenlooper, DemocratRe-elected November 3, 2026.
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Where it sits in Colorado
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
Spot a problem with this district? Email us about CO-03.