ZIP code 51301 is in Spencer (90% of residents) and Fostoria (1.1%), in Clay County, Iowa. 9.0% of its residents live outside city limits. It is in Iowa's 4th congressional district. Its state senate districts are State Senate District 3 (93%) and State Senate District 5 (7.1%); its state house districts are State House District 6 (93%) and State House District 10 (7.1%).
From Wikidata (community-maintained); confirm on the city's website.
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); Mayors: Wikidata (CC0).
9 voting precincts overlap ZIP 51301.
Map them, with each precinct's share of the ZIP's residents.
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ZIP 51301 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.