Lake County, Indiana
Lake County, Indiana, has 504,612 residents (July 2025 estimate). Its county seat is Crown Point. It uses Central Time and covers 499 sq mi (1,292 km²) of land.
- Resident population, July 2025
- 504,612
- Land area
- 499 sq mi (1,292 km²)
- County seat or government
- Crown Point
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $71,493 ± $1,419
- Median home value
- $230,600 ± $2,947
- Median rent, with utilities
- $1,131 ± $16
- Homes lived in by their owners
- 71.7% ± 0.7 points
- County type
- County
- Metro or micro area
- Chicago-Naperville-Elgin, IL-IN metro areaCentral county
- Water area
- 128 sq mi (331 km²)
- State
- Indiana
- County code (FIPS)
- 18089
- Coordinates (central point)
- 41.472247, -87.374337
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Lake County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 4630771,673 people
- 4641039,243 people
- 4634232,224 people
- 4631226,022 people
- 4637524,188 people
- 4632123,733 people
- 4632223,680 people
- 4631123,321 people
- 4632323,047 people
- 4632421,409 people
- 4635619,721 people
- 4637318,843 people
All 28
28 ZIP Code areas overlap Lake County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Townships in Lake County, largest first
- North Township154,735 people
- Calumet Township90,784 people
- St. John Township70,429 people
- Ross Township48,648 people
- Hobart Township40,326 people
- Center Township39,607 people
- Hanover Township19,712 people
- Winfield Township13,555 people
- Cedar Creek Township12,998 people
- West Creek Township7,843 people
- Eagle Creek Township1,742 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Indiana, by county
School districts in Lake County, largest first
- Hammond School City76,878 people
- Lake Central School Corporation70,429 people
- Gary Community School Corporation63,565 people
- Crown Point Community School Corporation53,162 people
- Merrillville Community School48,648 people
- City of East Chicago School District26,022 people
- Hobart School City24,264 people
- Munster School Town23,733 people
- Highland School Town23,680 people
- Tri-Creek School Corporation22,583 people
- Hanover Community School Corporation19,712 people
- Griffith Public Schools15,997 people
All 16
- Lake Ridge Schools11,222 people
- Lake Station Community Schools9,678 people
- River Forest Community School Corporation6,384 people
- Whiting School City4,422 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Hammond, Indiana (city)76,768 people
- Gary, Indiana (city)68,113 people
- Merrillville, Indiana (town)36,476 people
- Crown Point, Indiana (city)34,393 people
- Schererville, Indiana (town)29,701 people
- Hobart, Indiana (city)29,558 people
- East Chicago, Indiana (city)26,022 people
- Munster, Indiana (town)23,733 people
- Highland, Indiana (town)23,680 people
- St. John, Indiana (town)22,567 people
- Dyer, Indiana (town)16,400 people
- Griffith, Indiana (town)16,273 people
All 24
- Cedar Lake, Indiana (town)15,295 people
- Lake Station, Indiana (city)13,185 people
- Lowell, Indiana (town)11,073 people
- Winfield, Indiana (town)7,816 people
- Lakes of the Four Seasons, Indiana (CDP)7,402 people
- Ross, Indiana (CDP)6,751 people
- Whiting, Indiana (city)4,532 people
- New Chicago, Indiana (town)2,225 people
- Lake Dalecarlia, Indiana (CDP)1,169 people
- Schneider, Indiana (town)230 people
- Shelby, Indiana (CDP)164 people
- Leroy, Indiana (CDP)85 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Porter County, Indiana16 mi east
- Will County, Illinois31 mi west
- Cook County, Illinois32 mi northwest
- Jasper County, Indiana34 mi southeast
- Kankakee County, Illinois34 mi southwest
- Newton County, Indiana35 mi south
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.