Boundary Atlas

Summit, Illinois

Summit is a village in Cook County, Illinois, with 11,161 residents in 2020. It is in Illinois's 4th congressional district. Its state senate district is State Senate District 11; its state house district is State House District 21.

11,161residents (2020 Census)
2.1 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Cook County100%

Congressional district

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

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-04)Jesús G. "Chuy" García (D)202-225-8203100%
U.S. SenatorRichard J. Durbin (D)202-224-2152 · contact formstatewide
U.S. SenatorTammy Duckworth (D)202-224-2854 · contact formstatewide
State Senator (State Senate District 11)Mike Porfirio (Democratic)708-430-2510100%
State Representative (State House District 21)Abdelnasser Rashid (Democratic)708-956-7563100%

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 11100%

State house districtShare of residents
State House District 21100%

ZIP codes

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

Get this in your AI agent

Your agent can get Summit'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:1773638")

Summit 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.