South Branch Township is a civil township of Crawford County in the U.S. state of Michigan. The population was 1,842 at the 2000 census.
- Eldorado is an unincorporated community in the township along M-18 at . A post office named "Jack Pine" was established in 1895 to serve a scattered lumber settlement here. After a brief closure in 1898, the post office reopened as "Jackpine" from 1898 to 1908. In 1908, the name was changed to "Eldorado" by petition of its patrons, and remained open until 1952.
According to the United States Census Bureau
, the township has a total area of 105.6 square miles
), of which, 105.4 square miles (272.9 km²) of it is land and 0.2 square miles (0.6 km²) of it (0.24%) is water.
As of the census
of 2000, there were 1,842 people, 735 households, and 557 families residing in the township. The population density
was 17.5 per square mile (6.7/km²). There were 1,615 housing units at an average density of 15.3/sq mi (5.9/km²). The racial makeup of the township was 99.35% White
, 0.05% African American
, 0.11% Native American
, 0.11% Asian
, and 0.38% from two or more races. Hispanic
of any race were 0.49% of the population.
There were 735 households out of which 28.4% had children under the age of 18 living with them, 65.4% were married couples living together, 6.5% had a female householder with no husband present, and 24.2% were non-families. 20.4% of all households were made up of individuals and 7.6% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 2.88.
In the township the population was spread out with 24.0% under the age of 18, 5.5% from 18 to 24, 24.3% from 25 to 44, 28.8% from 45 to 64, and 17.3% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 107.4 males. For every 100 females age 18 and over, there were 105.6 males.
The median income for a household in the township was $34,537, and the median income for a family was $38,690. Males had a median income of $32,386 versus $19,868 for females. The per capita income for the township was $16,763. About 9.2% of families and 12.5% of the population were below the poverty line, including 20.4% of those under age 18 and 8.9% of those age 65 or over.