As of the 2010 United States Census, Shiawassee County had a 2010 population of 70,648. This decrease of -1,039 people from the 2000 United States Census represents a decrease of 1.4% during that ten-year period. In 2010 there were 27,481 households and 19,397 families in the county. The population density was 133.1 per square mile (51.4 square kilometers). There were 30,319 housing units at an average density of 57.1 per square mile (22.0 per km2). 96.7% of the population were White, 0.5% Native American, 0.5% Black or African American, 0.4% Asian, 0.5% of some other race and 1.5% of two or more races. 2.4% were Hispanic or Latino (of any race). 22.2% were of German, 21.8% English, 9.5% Irish, 5.2% French, French Canadian or Cajun and 5.1% Polish ancestry according to 2010 American Community Survey.