Boundary Atlas

ZIP code 50070: Dexter, IA

ZIP code 50070 is in Dexter (42% of residents) and Diamondhead Lake (24%), in Dallas County (48%), Guthrie County (31%), Madison County (13%) and Adair County (7.8%), Iowa. 34% of its residents live outside city limits. It is in Iowa's 3rd congressional district. Its state senate districts are State Senate District 12 (69%) and State Senate District 24 (31%); its state house districts are State House District 23 (69%) and State House District 47 (31%).

1,536residents (2020 Census)
65.0 sq miland area
2cities and towns
1congressional district
5voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Dexter42%
Diamondhead Lake24%

CountyShare of ZIP residents
Dallas County48%
Guthrie County31%
Madison County13%
Adair County7.8%

Town or county subdivisionShare of ZIP residents
Union township48%
Penn township31%
Penn township7.9%
Jackson township5.2%
Lincoln township4.6%
Harrison township3.2%
Stuart township0.1%

Congressional district

Congressional districtShare of ZIP residents
Iowa's 3rd congressional district (IA-03)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-03)Zachary Nunn (R)202-225-5476100%
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 12)Amy Sinclair (R)69%
State Senator (State Senate District 24)Jesse Green (R)31%
State Representative (State House District 23)Bubba Sorensen (R)69%
State Representative (State House District 47)Carter Nordman (R)31%

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 1269%
State Senate District 2431%

State house districtShare of ZIP residents
State House District 2369%
State House District 4731%

Voting precincts

5 voting precincts overlap ZIP 50070. Map them, with each precinct's share of the ZIP's residents.

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ZIP 50070 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.