ZIP code 66409: Monmouth, KS
ZIP code 66409 is in Shawnee County (92%), Douglas County (7.0%) and Osage County (0.7%), Kansas, outside any city or Census-designated place. It is in Kansas's 2nd congressional district. Its state senate districts are State Senate District 3 (98%) and State Senate District 20 (1.6%); its state house districts are State House District 54 (72%), State House District 56 (21%) and State House District 47 (7.0%).
See it on the mapAll of Kansas
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Shawnee County | 92% |
| Douglas County | 7.0% |
| Osage County | 0.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Monmouth township | 81% |
| Williamsport township | 8.9% |
| Kanwaka township | 3.7% |
| Clinton township | 3.3% |
| Topeka township | 2.7% |
| Elk township | 0.7% |
| Topeka city | land only |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Kansas's 2nd congressional district (KS-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (KS-02) | Derek Schmidt (R) | 202-225-6601 | 100% |
| 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 3) | Rick Kloos (R) | 98% | |
| State Senator (State Senate District 20) | Brenda Dietrich (R) | 1.6% | |
| State Representative (State House District 54) | Ken Corbet (R) | 72% | |
| State Representative (State House District 56) | Virgil Weigel (Democratic) | 21% | |
| State Representative (State House District 47) | Ronald Ellis (R) | 7.0% |
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
- Shawnee County website: http://www.snco.us
- Shawnee County laws: search for the Shawnee County, Kansas code of ordinances
- Douglas County laws: search for the Douglas County, Kansas code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 3 | 98% |
| State Senate District 20 | 1.6% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 54 | 72% |
| State House District 56 | 21% |
| State House District 47 | 7.0% |
Voting precincts
12 voting precincts overlap ZIP 66409. 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:66409")
ZIP 66409 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.