Boundary Atlas

Sandwich, Illinois

Sandwich is a city in DeKalb County (98% of residents) and Kendall County (2.2%), Illinois, with 7,221 residents in 2020. It is in Illinois's 14th congressional district. It spans 2 state senate and 2 state house districts.

7,221residents (2020 Census)
4.8 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
DeKalb County98%
Kendall County2.2%

Congressional district

Congressional districtShare of residents
Illinois's 14th congressional district (IL-14)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-14)Lauren Underwood (D)202-225-2976100%
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 38)Sue Rezin (R)815-220-8720100%
State Senator (State Senate District 35)Dave Syverson (R)815-987-75550.4%
State Representative (State House District 75)Jed Davis (R)331-867-8200100%
State Representative (State House District 70)Jeff Keicher (R)815-748-34940.4%

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 38100%
State Senate District 350.4%

State house districtShare of residents
State House District 75100%
State House District 700.4%

ZIP codes

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

Get this in your AI agent

Your agent can get Sandwich'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:1767548")

Sandwich 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.