ZIP code 66521: Onaga, KS
ZIP code 66521 is in Onaga (45% of residents) and Wheaton (6.4%), in Pottawatomie County (97%) and Nemaha County (3.0%), Kansas. 49% of its residents live outside city limits. It is in Kansas's 1st congressional district (97%) and Kansas's 2nd congressional district (3.0%). Its state senate districts are State Senate District 18 (97%) and State Senate District 1 (3.0%); its state house districts are State House District 61 (97%) and State House District 62 (3.0%).
See it on the mapAll of Kansas
City and county
| City or town | Share of ZIP residents |
|---|---|
| Onaga | 45% |
| Wheaton | 6.4% |
| County | Share of ZIP residents |
|---|---|
| Pottawatomie County | 97% |
| Nemaha County | 3.0% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mill Creek township | 62% |
| Lone Tree township | 14% |
| Sherman township | 6.4% |
| Vienna township | 5.3% |
| Center township | 4.5% |
| Neuchatel township | 3.0% |
| Union township | 1.7% |
| Lincoln township | 1.2% |
| Grant township | 0.7% |
| Clear Creek township | 0.3% |
| St. Clere township | land only |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Kansas's 1st congressional district (KS-01) | 97% |
| Kansas's 2nd congressional district (KS-02) | 3.0% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (KS-01) | Tracey Mann (R) | 202-225-2715 | 97% |
| U.S. Representative (KS-02) | Derek Schmidt (R) | 202-225-6601 | 3.0% |
| U.S. Senator | Jerry Moran (R) | 202-224-6521 · contact form | statewide |
| U.S. Senator | Roger Marshall (R) | 202-224-4774 · contact form | statewide |
| State Senator (State Senate District 18) | Kenny Titus (R) | 97% | |
| State Senator (State Senate District 1) | Craig Bowser (R) | 3.0% | |
| State Representative (State House District 61) | Francis Awerkamp (R) | 97% | |
| State Representative (State House District 62) | Sean Willcott (R) | 3.0% |
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
- Onaga website: http://www.Onaga.org
- Onaga laws: search for the Onaga, Kansas code of ordinances
- Wheaton laws: search for the Wheaton, Kansas code of ordinances
- Pottawatomie County website: http://www.PottCounty.org
- Pottawatomie County laws: search for the Pottawatomie County, Kansas code of ordinances
- Nemaha County laws: search for the Nemaha County, Kansas code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 18 | 97% |
| State Senate District 1 | 3.0% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 61 | 97% |
| State House District 62 | 3.0% |
Voting precincts
11 voting precincts overlap ZIP 66521. 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:66521")
ZIP 66521 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.