Iowa / IA-01
Iowa District 1
Score
Irregularity score 56 Middle of the packLess compact than 60% of other congressional districts.
174th least compact of 429 nationally, 1st of 4 in Iowa.
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
- 0.29at least as compact as 63% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.43at least as compact as 34% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.73at least as compact as 33% 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
37% 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.
- Davenport cityall 101,724 residents
- Iowa City cityall 74,828 residents
- Bettendorf cityall 39,102 residents
- Clinton cityall 24,469 residents
- Burlington cityall 23,982 residents
- Muscatine cityall 23,797 residents
- Coralville cityall 22,318 residents
- North Liberty cityall 20,479 residents
- Indianola cityall 15,833 residents
- Newton cityall 15,760 residents
And 234 smaller places. 22% of this district's people live outside any city, town or named community. How places are counted
ZIP codes
249 ZIP codes have residents in this district. 64 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.
Show all 249 ZIP codes
- 50001
- 50027 (95%)
- 50028 (99%)
- 50044 (99%)
- 50047 (91%)
- 50049 (1%)
- 50054
- 50055 (22%)
- 50057
- 50061 (46%)
- 50062
- 50104 (89%)
- 50106 (9%)
- 50112 (8%)
- 50116
- 50118
- 50119
- 50125
- 50127
- 50135
- 50136
- 50137
- 50138
- 50139 (89%)
- 50141 (17%)
- 50143
- 50145
- 50150 (1%)
- 50151 (9%)
- 50153 (98%)
- 50160
- 50161 (1%)
- 50162 (1%)
- 50163
- 50166
- 50168 (93%)
- 50169 (8%)
- 50170
- 50171 (1%)
- 50207 (98%)
- 50208
- 50210 (85%)
- 50211 (99%)
- 50214
- 50219
- 50225
- 50228 (99%)
- 50229 (72%)
- 50232
- 50234 (9%)
- 50237 (7%)
- 50240 (35%)
- 50241
- 50251
- 50252
- 50255
- 50256
- 50257 (3%)
- 50265 (1%)
- 50268
- 50320 (8%)
- 52030
- 52031 (91%)
- 52032 (49%)
- 52033 (29%)
- 52037
- 52054 (87%)
- 52060
- 52064
- 52069
- 52070
- 52071
- 52074
- 52075
- 52079 (55%)
- 52201
- 52203 (99%)
- 52205 (98%)
- 52207
- 52208 (6%)
- 52209 (3%)
- 52212
- 52216
- 52220
- 52221 (10%)
- 52222 (23%)
- 52227 (1%)
- 52228 (2%)
- 52231
- 52235
- 52236
- 52237 (1%)
- 52240
- 52241
- 52242
- 52245
- 52246
- 52247
- 52248
- 52251
- 52252
- 52253 (27%)
- 52254
- 52255
- 52301 (99%)
- 52305 (88%)
- 52306
- 52307
- 52308
- 52309
- 52310 (99%)
- 52312
- 52316
- 52317
- 52318 (11%)
- 52320
- 52321
- 52322
- 52323
- 52325
- 52327
- 52333
- 52334
- 52335
- 52337
- 52338 (99%)
- 52340
- 52347 (81%)
- 52353
- 52355
- 52356
- 52358
- 52359
- 52361
- 52362
- 52404 (1%)
- 52501 (1%)
- 52533 (84%)
- 52534
- 52535
- 52540
- 52542 (93%)
- 52543
- 52550
- 52551 (99%)
- 52553 (27%)
- 52554 (5%)
- 52556
- 52557
- 52561
- 52562
- 52563 (80%)
- 52565
- 52567
- 52568
- 52570 (88%)
- 52573 (89%)
- 52576
- 52577
- 52580
- 52585
- 52586
- 52588 (79%)
- 52591
- 52595
- 52601
- 52619
- 52620
- 52621
- 52623
- 52624
- 52625
- 52626 (96%)
- 52627
- 52630
- 52631
- 52632
- 52635
- 52637
- 52638
- 52639
- 52640
- 52641
- 52644
- 52645
- 52646
- 52647
- 52649
- 52650
- 52651
- 52652
- 52653
- 52654
- 52655
- 52656
- 52657
- 52658
- 52659
- 52660
- 52701
- 52720
- 52721
- 52722
- 52726
- 52727
- 52728
- 52729
- 52730
- 52731
- 52732
- 52737
- 52738
- 52739
- 52742
- 52745
- 52746
- 52747
- 52748
- 52749
- 52750
- 52751
- 52752
- 52753
- 52754
- 52755
- 52756
- 52757
- 52758
- 52759
- 52760
- 52761
- 52765
- 52766
- 52767
- 52768
- 52769
- 52771
- 52772
- 52773
- 52774
- 52776
- 52777
- 52778
- 52801
- 52802
- 52803
- 52804
- 52806
- 52807
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. Iowa 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
Christina Bohannan, Democrat
Elected November 3, 2026, takes office January 3, 2027.
Unofficial results from the Iowa 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
Iowa's senators
- Joni Ernst, RepublicanSeat on the November 3, 2026 ballot: Josh Turek, Democrat, won and takes office January 3, 2027.
- Chuck Grassley, Republican
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 Iowa
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
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