Ingham County was established by an act of the Michigan Territorial Legislature on October 29, 1829, from portions of Shiawassee County, Washtenaw County and unorganized territory. It was attached for administrative purposes to Washtenaw County until 1838 when county government was established for Ingham.
The county is named for Samuel D. Ingham, the U.S. Secretary of the Treasury under President Andrew Jackson, making Ingham one of the so-called Cabinet counties.
The county consists of gently rolling hills with an elevation ranging between 800 to 1000 feet above sea level. The Grand River winds northward along the western boundary of the county and the Red Cedar River flows west across the northern section into the Grand River in Lansing. Most of the midsection of the county drains to the north into the Red Cedar River and the northern tier of townships drain to the south into the Cedar. The Sycamore Creek, flowing northwest into the Red Cedar in Lansing, drains much of the midsection of the county. Most of the southern portion of the county drains south or west into the Grand River. The southeastern corner drains to the southeast into the Huron River via the Portage Creek and Portage River and a series of small lakes.
There were 108,593 households out of which 29.80% had children under the age of 18 living with them, 43.00% were married couples living together, 12.10% had a female householder with no husband present, and 41.30% were non-families. 30.20% of all households were made up of individuals and 7.70% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 3.04.
In the county the population was spread out with 23.40% under the age of 18, 18.50% from 18 to 24, 28.60% from 25 to 44, 20.10% from 45 to 64, and 9.40% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 93.30 males. For every 100 females age 18 and over, there were 90.10 males.
The median income for a household in the county was $40,774, and the median income for a family was $53,063. Males had a median income of $40,335 versus $30,178 for females. The per capita income for the county was $21,079. About 8.30% of families and 14.60% of the population were below the poverty line, including 14.60% of those under age 18 and 6.60% of those age 65 or over.
The county government operates the jail, maintains rural roads, operates the major local courts, keeps files of deeds and mortgages, maintains vital records, administers public health regulations, and participates with the state in the provision of welfare and other social services. The 16-member county board of commissioners controls the budget, but has only limited authority to make laws or ordinances due to Michigan's large devolution of local power to cities, villages, and townships. The county board of commissioners also hires a county administrator/controller who serves as the chief fiscal and administrative officer of the county.
(information as of October 2006)
Villages
Unincorporated
Townships