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Where am ILOCATED

Washtenaw County, Michigan

Washtenaw County, Michigan, has 370,214 residents (July 2025 estimate). Its county seat is Ann Arbor. It uses Eastern Time and covers 706 sq mi (1,829 km²) of land.

DetroitGrand Rapids
Washtenaw County in Michigan
Ann ArborYpsilantiSalineWhitmore LakeMilan
Washtenaw County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
370,214
Land area
706 sq mi (1,829 km²)
County seat or government
Ann Arbor
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$89,180 ± $2,487
Median home value
$374,100 ± $4,164
Median rent, with utilities
$1,463 ± $21
Homes lived in by their owners
61.6% ± 0.8 points
County type
County
Metro or micro area
Ann Arbor, MI metro areaCentral county
Water area
16.4 sq mi (42.5 km²)
State
Michigan
County code (FIPS)
26161
Coordinates (central point)
42.252217, -83.843423
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 Washtenaw County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/DetroitUTC-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. 4819766,525 people
  2. 4810355,054 people
  3. 4811144,709 people
  4. 4810443,979 people
  5. 4817040,076 people
  6. 4819839,244 people
  7. 4817837,789 people
  8. 4810537,048 people
  9. 4810827,666 people
  10. 4816825,038 people
  11. 4816724,713 people
  12. 4817623,451 people
All 27
  1. 4816920,519 people
  2. 4813016,986 people
  3. 4816013,972 people
  4. 4818913,893 people
  5. 4811813,246 people
  6. 492408,863 people
  7. 481587,770 people
  8. 492856,240 people
  9. 481095,939 people
  10. 492365,026 people
  11. 481914,403 people
  12. 481374,157 people
  13. 492293,540 people
  14. 492871,958 people
  15. 4819076 people

27 ZIP Code areas overlap Washtenaw 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 Washtenaw County, largest first

  1. Ypsilanti Charter Township55,066 people
  2. Pittsfield Charter Township39,438 people
  3. Scio Township17,725 people
  4. Superior Charter Township14,923 people
  5. York Charter Township9,149 people
  6. Northfield Township8,595 people
  7. Augusta Charter Township7,228 people
  8. Salem Township6,932 people
  9. Dexter Township6,634 people
  10. Webster Township6,575 people
  11. Lodi Township6,394 people
  12. Manchester Township4,611 people
All 20
  1. Ann Arbor Charter Township4,606 people
  2. Lima Township4,058 people
  3. Sylvan Township3,451 people
  4. Lyndon Township2,663 people
  5. Saline Township2,375 people
  6. Sharon Township1,818 people
  7. Bridgewater Township1,565 people
  8. Freedom Township1,339 people

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

School districts in Washtenaw County, largest first

  1. Ann Arbor Public Schools176,038 people
  2. Plymouth-Canton Community Schools130,938 people
  3. Ypsilanti Community Schools59,806 people
  4. South Lyon Community Schools55,723 people
  5. Van Buren Public Schools49,655 people
  6. Northville Public Schools41,033 people
  7. Lincoln Consolidated School District32,438 people
  8. Saline Area Schools28,437 people
  9. Pinckney Community Schools25,651 people
  10. Dexter Community School District21,860 people
  11. Milan Area Schools16,780 people
  12. Chelsea School District16,402 people
All 18
  1. Columbia School District11,246 people
  2. Stockbridge Community Schools10,051 people
  3. Whitmore Lake Public Schools9,138 people
  4. Manchester Community Schools7,813 people
  5. Grass Lake Community Schools7,385 people
  6. Clinton Community Schools6,009 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. Ann Arbor, Michigan (city)122,036 people
  2. Ypsilanti, Michigan (city)19,857 people
  3. Saline, Michigan (city)9,006 people
  4. Whitmore Lake, Michigan (CDP)7,878 people
  5. Milan, Michigan (city)5,987 people
  6. Chelsea, Michigan (city)5,426 people
  7. Dexter, Michigan (city)4,521 people
  8. Manchester, Michigan (village)2,522 people
  9. Barton Hills, Michigan (village)430 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Livingston County, Michigan24 mi north
  2. Lenawee County, Michigan27 mi southwest
  3. Jackson County, Michigan30 mi west
  4. Monroe County, Michigan30 mi southeast
  5. Wayne County, Michigan30 mi east
  6. Oakland County, Michigan37 mi northeast

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.