St. John, Indiana
St. John is a town in Lake County, Indiana, with 20,088 residents in 2020. It is in Indiana's 1st congressional district. It spans 2 state senate and 2 state house districts.
County
| County | Share of residents |
|---|---|
| Lake County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Indiana's 1st congressional district (IN-01) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IN-01) | Frank J. Mrvan (D) | 202-225-2461 | 100% |
| U.S. Senator | Jim Banks (R) | 202-224-4814 | statewide |
| U.S. Senator | Todd Young (R) | 202-224-5623 · contact form | statewide |
| State Senator (State Senate District 1) | Dan Dernulc (R) | 100% | |
| State Senator (State Senate District 6) | Rick Niemeyer (R) | 0.1% | |
| State Representative (State House District 15) | Hal Slager (R) | 99% | |
| State Representative (State House District 19) | Julie Olthoff (R) | 0.7% |
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
- St. John website: https://stjohnin.gov/
- St. John laws: search for the St. John, Indiana code of ordinances
- Lake County website: http://www.lakecountyin.org
- Lake County laws: search for the Lake County, Indiana code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 1 | 100% |
| State Senate District 6 | 0.1% |
| State house district | Share of residents |
|---|---|
| State House District 15 | 99% |
| State House District 19 | 0.7% |
ZIP codes
Percentages mark ZIPs only partly in St. John: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get St. John'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:1866852")
St. John 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.