Byrnes Mill, Missouri
Byrnes Mill is a city in Jefferson County, Missouri, with 3,173 residents in 2020. It is in Missouri's 3rd congressional district. Its state senate district is State Senate District 22; its state house district is State House District 111.
County
| County | Share of residents |
|---|---|
| Jefferson County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Missouri's 3rd congressional district (MO-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MO-03) | Robert F. Onder, Jr. (R) | 202-225-2956 | 100% |
| U.S. Senator | Eric Schmitt (R) | 202-224-5721 · contact form | statewide |
| U.S. Senator | Josh Hawley (R) | 202-224-6154 · contact form | statewide |
| State Senator (State Senate District 22) | Mary Elizabeth Coleman (R) | 100% | |
| State Representative (State House District 111) | Cecelie Williams (R) | 100% |
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
- Byrnes Mill laws: search for the Byrnes Mill, Missouri code of ordinances
- Jefferson County website: http://www.jeffcomo.org
- Jefferson County laws: search for the Jefferson County, Missouri code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 22 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 111 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Byrnes Mill: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Byrnes Mill's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:2910240")
Byrnes Mill here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.