Boundary Atlas

ZIP code 50703: Waterloo, IA

ZIP code 50703 is in Waterloo (91% of residents), in Black Hawk County, Iowa. 8.8% of its residents live outside city limits. It is in Iowa's 2nd congressional district. Its state senate districts are State Senate District 31 (91%), State Senate District 34 (8.6%) and State Senate District 38 (0.2%); its state house districts are State House District 62 (76%), State House District 61 (15%), State House District 68 (8.6%) and State House District 76 (0.2%).

18,913residents (2020 Census)
93.2 sq miland area
2cities and towns
1congressional district
14voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Waterloo91%
Elk Run Heights0.2%

CountyShare of ZIP residents
Black Hawk County100%

Town or county subdivisionShare of ZIP residents
Waterloo city91%
Mount Vernon township2.9%
Bennington township1.8%
Poyner township1.8%
East Waterloo township1.5%
Barclay township0.8%

Congressional district

Congressional districtShare of ZIP residents
Iowa's 2nd congressional district (IA-02)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-02)Ashley Hinson (R)202-225-2911100%
U.S. SenatorChuck Grassley (R)202-224-3744 · contact formstatewide
U.S. SenatorJoni Ernst (R)202-224-3254 · contact formstatewide
State Senator (State Senate District 31)Bill Dotzler (Democratic)91%
State Senator (State Senate District 34)Dan Zumbach (R)8.6%
State Senator (State Senate District 38)Dave Sires (R)0.2%
State Representative (State House District 62)Jerome Amos (Democratic)76%
State Representative (State House District 61)Timi Brown-Powers (Democratic)15%
State Representative (State House District 68)Chad Ingels (R)8.6%
State Representative (State House District 76)Derek Wulf (R)0.2%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 3191%
State Senate District 348.6%
State Senate District 380.2%

State house districtShare of ZIP residents
State House District 6276%
State House District 6115%
State House District 688.6%
State House District 760.2%

Voting precincts

14 voting precincts overlap ZIP 50703. Map them, with each precinct's share of the ZIP's residents.

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ZIP 50703 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.