DeKalb, Illinois
DeKalb is a city in DeKalb County, Illinois, with 40,301 residents in 2020. It is in Illinois's 14th congressional district. It spans 2 state senate and 2 state house districts.
County
| County | Share of residents |
|---|---|
| DeKalb County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Illinois's 14th congressional district (IL-14) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-14) | Lauren Underwood (D) | 202-225-2976 | 100% |
| U.S. Senator | Richard J. Durbin (D) | 202-224-2152 · contact form | statewide |
| U.S. Senator | Tammy Duckworth (D) | 202-224-2854 · contact form | statewide |
| State Senator (State Senate District 38) | Sue Rezin (R) | 815-220-8720 | 98% |
| State Senator (State Senate District 37) | Li Arellano (R) | 779-251-5003 | 1.8% |
| State Representative (State House District 76) | Murri Briel (Democratic) | 815-587-7912 | 98% |
| State Representative (State House District 74) | Brad Fritts (R) | 815-561-3690 | 1.8% |
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
- DeKalb website: http://www.cityofdekalb.com/
- DeKalb laws: search for the DeKalb, Illinois code of ordinances
- DeKalb County website: http://dekalbcounty.org/
- DeKalb County laws: search for the DeKalb County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 38 | 98% |
| State Senate District 37 | 1.8% |
| State house district | Share of residents |
|---|---|
| State House District 76 | 98% |
| State House District 74 | 1.8% |
ZIP codes
Percentages mark ZIPs only partly in DeKalb: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get DeKalb'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:1719161")
DeKalb 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.