Boundary Atlas

ZIP code 57451: Ipswich, SD

ZIP code 57451 is in Ipswich (39% of residents), Mina (23%), Pembrook Colony (5.7%) and Deerfield Colony (5.4%), in Edmunds County (97%) and Brown County (3.2%), South Dakota. 27% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate districts are State Senate District 23 (98%) and State Senate District 1 (2.4%); its state house districts are State House District 23 (98%) and State House District 1 (2.4%).

2,381residents (2020 Census)
430.2 sq miland area
4cities and towns
1congressional district
5voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Ipswich39%
Mina23%
Pembrook Colony5.7%
Deerfield Colony5.4%

CountyShare of ZIP residents
Edmunds County97%
Brown County3.2%

Town or county subdivisionShare of ZIP residents
Ipswich city39%
Cortlandt township25%
Harmony township12%
Belle township6.2%
Ipswich township4.3%
Fountain township2.9%
Mercier township2.0%
Huntley township1.9%
Richland township1.4%
Highland township1.3%
Powell township1.2%
Union township0.8%
Rosette township0.7%
Kent township0.5%
Adrian township0.3%
Cleveland township0.2%
Pembrook township0.2%
Liberty township0.2%
Clear Lake township<0.1%
Ravinia townshipland only

Congressional district

Congressional districtShare of ZIP residents
South Dakota's at-large congressional district (SD-AL)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (SD-AL)Dusty Johnson (R)202-225-2801100%
U.S. SenatorJohn Thune (R)202-224-2321 · contact formstatewide
U.S. SenatorMike Rounds (R)202-224-5842 · contact formstatewide
State Senator (State Senate District 23)Mark Lapka (R)98%
State Senator (State Senate District 1)Michael Rohl (R)2.4%
State Representative (State House District 23)Scott Moore (R)98%
State Representative (State House District 23)Spencer Gosch (R)98%
State Representative (State House District 1)Logan Manhart (R)2.4%
State Representative (State House District 1)Nick Fosness (R)2.4%

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 2398%
State Senate District 12.4%

State house districtShare of ZIP residents
State House District 2398%
State House District 12.4%

Voting precincts

5 voting precincts overlap ZIP 57451. Map them, with each precinct's share of the ZIP's residents.

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ZIP 57451 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.