Boundary Atlas

Cotati, California

Cotati is a city in Sonoma County, California, with 7,584 residents in 2020. It is in California's 4th congressional district. Its state senate district is State Senate District 3; its state house district is Assembly District 12.

7,584residents (2020 Census)
1.9 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Sonoma County100%

Congressional district

Congressional districtShare of residents
California's 4th congressional district (CA-04)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-04)Mike Thompson (D)202-225-3311100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 3)Christopher Cabaldon (Democratic)707-454-3808100%
Assembly Member (Assembly District 12)Damon Connolly (Democratic)415-479-4920100%

Elected in 2024 under CA'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

State legislative districts

State senate districtShare of residents
State Senate District 3100%

State house districtShare of residents
Assembly District 12100%

ZIP codes

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

Get this in your AI agent

Your agent can get Cotati's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0616560")

Cotati 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.