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Where am ILOCATED

Hamilton County, Indiana

Hamilton County, Indiana, has 387,036 residents (July 2025 estimate). Its county seat is Noblesville. It uses Eastern Time and covers 394 sq mi (1,021 km²) of land.

IndianapolisFort WayneEvansville
Hamilton County in Indiana
Madison CountyFishersCarmelNoblesvilleWestfieldCicero
Hamilton County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
387,036
Land area
394 sq mi (1,021 km²)
County seat or government
Noblesville
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$121,530 ± $2,737
Median home value
$405,500 ± $5,201
Median rent, with utilities
$1,574 ± $42
Homes lived in by their owners
76.1% ± 0.8 points
County type
County
Metro or micro area
Indianapolis-Carmel-Greenwood, IN metro areaCentral county
Water area
8.08 sq mi (20.9 km²)
State
Indiana
County code (FIPS)
18057
Coordinates (central point)
40.053513, -86.021709
Open this point in the location finder

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 Hamilton County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/Indiana/IndianapolisUTC-05:00 in January; UTC-04:00 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

  1. 4603251,515 people
  2. 4607448,901 people
  3. 4603748,713 people
  4. 4606047,610 people
  5. 4603843,754 people
  6. 4606241,060 people
  7. 4603340,881 people
  8. 4607736,760 people
  9. 4626035,707 people
  10. 4623626,416 people
  11. 4626825,913 people
  12. 4625620,990 people
All 23
  1. 4624019,595 people
  2. 4625018,147 people
  3. 4605516,010 people
  4. 4604015,943 people
  5. 460347,531 people
  6. 462807,514 people
  7. 460697,504 people
  8. 460303,035 people
  9. 460312,456 people
  10. 460501,808 people
  11. 4629081 people

23 ZIP Code areas overlap Hamilton 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 Hamilton County, largest first

  1. Clay Township101,217 people
  2. Fall Creek Township73,319 people
  3. Noblesville Township66,553 people
  4. Westfield Washington Township57,875 people
  5. Delaware Township35,734 people
  6. Wayne Township11,287 people
  7. Jackson Township11,201 people
  8. White River Township2,519 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Indiana, by county

School districts in Hamilton County, largest first

  1. Hamilton Southeastern Schools120,340 people
  2. Carmel Clay Schools101,217 people
  3. Noblesville Schools66,553 people
  4. Westfield-Washington Schools57,875 people
  5. Hamilton Heights School Corporation13,720 people
  6. Sheridan Community Schools6,493 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.

  1. Fishers, Indiana (city)102,337 people
  2. Carmel, Indiana (city)101,651 people
  3. Noblesville, Indiana (city)73,362 people
  4. Westfield, Indiana (city)54,677 people
  5. Cicero, Indiana (town)5,509 people
  6. Sheridan, Indiana (town)3,205 people
  7. Arcadia, Indiana (town)1,556 people
  8. Atlanta, Indiana (town)816 people
  9. Hortonville, Indiana (CDP)229 people
  10. Fishersburg, Indiana (CDP)190 people
  11. Riverwood, Indiana (CDP)87 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Madison County, Indiana18 mi northeast
  2. Tipton County, Indiana18 mi north
  3. Marion County, Indiana20 mi south
  4. Hancock County, Indiana21 mi southeast
  5. Boone County, Indiana24 mi west
  6. Clinton County, Indiana30 mi northwest

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.

See this county on Census.gov ↗

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.