Boundary Atlas

Cincinnati, Ohio

Cincinnati is a city in Hamilton County, Ohio, with 309,399 residents in 2020. It spans 2 congressional districts: OH-01 (100%) and OH-08 (<0.1%). It spans 2 state senate and 4 state house districts.

309,399residents (2020 Census)
77.9 sq miland area
31ZIP codes
2congressional districts

County

CountyShare of residents
Hamilton County100%

Congressional districts

Congressional districtShare of residents
Ohio's 1st congressional district (OH-01)100%
Ohio's 8th congressional district (OH-08)<0.1%

Elected officials

OfficeMemberContactShare of residents
MayorAftab Pureval513-352-3250citywide
U.S. Representative (OH-01)Greg Landsman (D)202-225-2216100%
U.S. Representative (OH-08)Warren Davidson (R)202-225-6205<0.1%
U.S. SenatorBernie Moreno (R)202-224-2315statewide
U.S. SenatorJon Husted (R)202-224-3353statewide
State Senator (State Senate District 9)Catherine Ingram (Democratic)100%
State Senator (State Senate District 8)Bill Blessing (R)<0.1%
State Representative (State House District 24)Dani Isaacsohn (Democratic)38%
State Representative (State House District 25)Cecil Thomas (Democratic)34%
State Representative (State House District 26)Ashley Bryant Bailey (Democratic)28%
State Representative (State House District 27)Rachel Baker (Democratic)<0.1%

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: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of residents
State Senate District 9100%
State Senate District 8<0.1%

State house districtShare of residents
State House District 2438%
State House District 2534%
State House District 2628%
State House District 27<0.1%

ZIP codes

Percentages mark ZIPs only partly in Cincinnati: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Cincinnati'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:3915000")

Cincinnati 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.