Crystal Lake, Illinois
Crystal Lake is a city in McHenry County, Illinois, with 40,292 residents in 2020. It spans 2 congressional districts: IL-09 (57%) and IL-11 (43%). It spans 3 state senate and 4 state house districts.
County
| County | Share of residents |
|---|---|
| McHenry County | 100% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Illinois's 9th congressional district (IL-09) | 57% |
| Illinois's 11th congressional district (IL-11) | 43% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-09) | Janice D. Schakowsky (D) | 202-225-2111 | 57% |
| U.S. Representative (IL-11) | Bill Foster (D) | 202-225-3515 | 43% |
| 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 33) | Don DeWitte (R) | 847-214-8245 | 68% |
| State Senator (State Senate District 32) | Craig Wilcox (R) | 815-455-6330 | 23% |
| State Senator (State Senate District 35) | Dave Syverson (R) | 815-987-7555 | 9.6% |
| State Representative (State House District 66) | Suzanne Ness (Democratic) | 224-484-8620 | 68% |
| State Representative (State House District 63) | Steve Reick (R) | 815-880-5340 | 23% |
| State Representative (State House District 70) | Jeff Keicher (R) | 815-748-3494 | 7.1% |
| State Representative (State House District 69) | Joe Sosnowski (R) | 815-547-3436 | 2.5% |
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
- Crystal Lake website: http://www.crystallake.org/
- Crystal Lake laws: search for the Crystal Lake, Illinois code of ordinances
- McHenry County website: http://www.co.mchenry.il.us
- McHenry County laws: search for the McHenry County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 33 | 68% |
| State Senate District 32 | 23% |
| State Senate District 35 | 9.6% |
| State house district | Share of residents |
|---|---|
| State House District 66 | 68% |
| State House District 63 | 23% |
| State House District 70 | 7.1% |
| State House District 69 | 2.5% |
ZIP codes
Percentages mark ZIPs only partly in Crystal Lake: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Crystal Lake'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:1717887")
Crystal Lake 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.