Boundary Atlas

Northlake, Illinois

Northlake is a city in Cook County, Illinois, with 12,840 residents in 2020. It is in Illinois's 4th congressional district. It spans 2 state senate and 2 state house districts.

12,840residents (2020 Census)
3.2 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 39)Don Harmon (Democratic)708-848-200297%
State Senator (State Senate District 4)Kimberly Lightford (Democratic)708-632-45003.3%
State Representative (State House District 77)Norma Hernandez (Democratic)708-365-849897%
State Representative (State House District 7)Chris Welch (Democratic)708-450-10003.3%

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 3997%
State Senate District 43.3%

State house districtShare of residents
State House District 7797%
State House District 73.3%

ZIP codes

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

Get this in your AI agent

Your agent can get Northlake'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:1753871")

Northlake 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.