Delta County is a county in the Upper Peninsula in the U.S. state of Michigan. As of the 2010 census, the population was 37,069. The county seat is Escanaba. The county was surveyed in 1843 and organized in 1861. Its name originates from the Greek letter “delta”, which refers to the triangular shape of the original county which included segments of Menominee, Dickinson, Iron, and Marquette counties.
According to the U.S. Census Bureau, the county has a total area of 1,991 square miles (5,160 km), of which 1,171 square miles (3,030 km) is land and 820 square miles (2,100 km) (41%) is water. It is the fifth-largest county in Michigan by land area.
The 2010 United States Census indicates Delta County had population of 37,069. This decrease of 1,451 people from the 2000 United States Census represents a 3.8% population decrease during that 10-year period. In 2010 there were 15,992 households and 10,381 families in the county. The population density was 31.7 per square mile (12.2 per km²). There were 20,214 housing units at an average density of 17.3 per square mile (6.7 per km²). 94.7% of the population were White, 2.4% Native American, 0.4% Asian, 0.2% Black or African American, 0.2% of some other race and 2.1% of two or more races. 0.9% were Hispanic or Latino (of any race). 20.8% were of French, French Canadian or Cajun, 15.5% German, 10.3% Swedish and 7.6% Irish ancestry.
There were 15,992 households out of which 25.5% had children under the age of 18 living with them, 51.7% were husband and wife families, 8.8% had a female householder with no husband present, 35.1% were non-families, and 29.8% were made up of individuals. The average household size was 2.28 and the average family size was 2.80.
The county population contained 20.9% under age of 18, 7.3% from 18 to 24, 21.1% from 25 to 44, 31.6% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 46 years. 49.5% of the population were male, and 50.5% of the population female.
The 2010 American Community Survey 3-year estimate indicates the median income for a household in the county was $40,967 and the median income for a family was $49,557. Males had a median income of $28,702 versus $15,093 for females. The per capita income for the county was $21,751. About 2.4% of families and 13.2% of the population were below the poverty line, including 17.4% of those under the age 18 and 8.5% of those age 65 or over.