ZIP code 52577: Oskaloosa, IA

ZIP code 52577 is in Oskaloosa (77% of residents), in Mahaska County, Iowa. 23% of its residents live outside city limits. It is in Iowa's 1st congressional district. Its state senate districts are State Senate District 44 (90%) and State Senate District 19 (10.0%); its state house districts are State House District 88 (90%) and State House District 37 (10.0%).

14,974residents (2020 Census)

158.4 sq miland area

4cities and towns

1congressional district

9voting precincts

See it on the map All of Iowa

City and county

City or town	Share of ZIP residents
Oskaloosa	77%
Keomah Village	0.7%
Beacon	0.5%
University Park	0.4%

County	Share of ZIP residents
Mahaska County	100%

Town or county subdivision	Share of ZIP residents
Oskaloosa city	77%
Spring Creek township	7.3%
Garfield township	5.7%
Lincoln township	2.4%
East Des Moines township	2.0%
Harrison township	1.7%
Madison township	1.1%
Scott township	1.0%
Jefferson township	0.8%
White Oak township	0.4%
West Des Moines township	0.4%
Cedar township	<0.1%

Congressional district

Congressional district	Share of ZIP residents
Iowa's 1st congressional district (IA-01)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (IA-01)	Mariannette Miller-Meeks (R)	202-225-6576	100%
U.S. Senator	Chuck Grassley (R)	202-224-3744 · contact form	statewide
U.S. Senator	Joni Ernst (R)	202-224-3254 · contact form	statewide
State Senator (State Senate District 44)	Adrian Dickey (R)		90%
State Senator (State Senate District 19)	Ken Rozenboom (R)		10.0%
State Representative (State House District 88)	Helena Hayes (R)		90%
State Representative (State House District 37)	Barb Kniff McCulla (R)		10.0%

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

Oskaloosa website: http://www.oskaloosaiowa.org/
Oskaloosa laws: search for the Oskaloosa, Iowa code of ordinances
Mahaska County website: http://www.mahaskacounty.org
Mahaska County laws: search for the Mahaska County, Iowa code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 44	90%
State Senate District 19	10.0%

State house district	Share of ZIP residents
State House District 88	90%
State House District 37	10.0%

Voting precincts

9 voting precincts overlap ZIP 52577. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:52577")

ZIP 52577 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.