Fairfield, Ohio
Fairfield is a city in Butler County, Ohio, with 44,907 residents in 2020. It is in Ohio's 8th congressional district. Its state senate district is State Senate District 4; its state house district is State House District 45.
County
| County | Share of residents |
|---|---|
| Butler County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Ohio's 8th congressional district (OH-08) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (OH-08) | Warren Davidson (R) | 202-225-6205 | 100% |
| U.S. Senator | Bernie Moreno (R) | 202-224-2315 | statewide |
| U.S. Senator | Jon Husted (R) | 202-224-3353 | statewide |
| State Senator (State Senate District 4) | George Lang (R) | 100% | |
| State Representative (State House District 45) | Jennifer Gross (R) | 100% |
Elected in 2024 under OH's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
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
- Fairfield website: http://www.fairfield-city.org/
- Fairfield laws: search for the Fairfield, Ohio code of ordinances
- Butler County website: https://bcohio.gov
- Butler County laws: search for the Butler County, Ohio code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 4 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 45 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Fairfield: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Fairfield'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:3925970")
Fairfield 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.