Ann Arbor, Michigan

county seat of Washtenaw County, Michigan, United States

Ann Arbor is a city in the US state of Michigan. It is the county seat of Washtenaw County.[5] According to the 2010 United States Census, Ann Arbor was the 6th largest city in Michigan. In 2010, there were 113,934 people living there.[6] The city is part of the Detroit Metropolitan Combined Statistial Area.

City of Ann Arbor
City downtown at sunset
A2 ("A" Squared), A2 ("A"-two), Tree Town, The People's Republic of Ann Arbor
City of Ann Arbor is located in Michigan
City of Ann Arbor
City of Ann Arbor
Location of Ann Arbor within Michigan.
Coordinates: 42°16′53″N 83°44′54″W / 42.28139°N 83.74833°W / 42.28139; -83.74833Coordinates: 42°16′53″N 83°44′54″W / 42.28139°N 83.74833°W / 42.28139; -83.74833
Country United States
State Michigan
 • TypeCouncil-Manager
 • MayorJohn Hieftje
 • City AdministratorSteve Powers
 • City28.70 sq mi (74.33 km2)
 • Land27.83 sq mi (72.08 km2)
 • Water0.87 sq mi (2.25 km2)
840 ft (256 m)
 • City113,934
 • Estimate 
 • Density4,093.9/sq mi (1,580.7/km2)
 • Urban
 • Metro
Demonym(s)Ann Arborite
Time zoneUTC-5 (EST)
 • Summer (DST)UTC-4 (EDT)
ZIP codes
48103, 48104, 48105, 48106, 48107, 48108, 48109, 48113
Area code(s)734
FIPS code26-03000[4]
GNIS feature ID0620133[4]

Ann Arbor was started in 1824. It is thought that the city is named after the wife, Ann, of one of the founders.[7]:1-2 The University of Michigan was moved to Ann Arbor in 1837. (Before that, the university had been in Detroit.) The city grew during the 1800s and 1900s. The only time the city did not grow was the Depression of 1873.

During the 1960s and 1970s, Ann Arbor was an important place for the Civil Rights Movement, the anti-Vietnam War movement, and for left-wing and liberal politics.

Today, Ann Arbor is home to the University of Michigan. The university is very important to the city because 30,000 people work for it. 12,000 of these workers work for the University of Michigan Health System, which are hospitals and clinics run by the university. Ann Arbor's economy is also very high-tech. High-tech companies come to the area because there are many graduates and a lot of research and development money at the university.[8]


  1. "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-11-25.
  2. "American FactFinder". United States Census Bureau. Retrieved 2012-11-25.
  3. "Population Estimates". United States Census Bureau. Retrieved 2013-01-02.
  4. 4.0 4.1 "Ann Arbor". Geographic Names Information System. United States Geological Survey.
  5. "Bibliography on Washtenaw County". Clarke Historical Library, Central Michigan University. Retrieved January 23, 2013.
  6. Population of Michigan Cities, Villages, Townships, and Remainders of Townships.
  7. Marwil, Jonathan (1991). A History of Ann Arbor. University of Michigan Press. ISBN 978-0-472-06463-2.
  8. "Ann Arbor: Introduction". Advameg, Inc. 2008. Retrieved 2008-08-04.