ZIP code 46405: Lake Station, IN

ZIP code 46405 is in Lake Station (98% of residents) and New Chicago (1.7%), in Lake County, Indiana. It is in Indiana's 1st congressional district. Its state senate district is State Senate District 3; its state house district is State House District 3.

11,860residents (2020 Census)

9.0 sq miland area

3cities and towns

1congressional district

12voting precincts

See it on the map All of Indiana

City and county

City or town	Share of ZIP residents
Lake Station	98%
New Chicago	1.7%
Gary	0.6%

County	Share of ZIP residents
Lake County	100%

Town or county subdivision	Share of ZIP residents
Hobart township	100%
Calumet township	land only

Congressional district

Congressional district	Share of ZIP residents
Indiana's 1st congressional district (IN-01)	100%

Members of Congress

Office	Member	Contact
U.S. Representative (IN-01)	Frank J. Mrvan (D)	202-225-2461
U.S. Senator	Jim Banks (R)	202-224-4814
U.S. Senator	Todd Young (R)	202-224-5623 · contact form

Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).

State legislative districts

State senate district	Share of ZIP residents
State Senate District 3	100%

State house district	Share of ZIP residents
State House District 3	100%

Voting precincts

12 voting precincts overlap ZIP 46405. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

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ZIP 46405 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.