Sandusky is a city in the U.S. state of Michigan. The population was 2,679 at the 2010 census. It is the county seat of Sanilac County.

As of the census of 2010, there were 2,679 people, 1,124 households, and 616 families lively in the city. The population density was 1,251.9 inhabitants per square mile (483.4/km²). There were 1,258 housing units at an average density of 587.9 per square mile (227.0/km). The racial makeup of the city was 94.4% White, 1.5% African American, 0.3% Native American, 1.1% Asian, 1.3% from extra races, and 1.4% from two or more races. Hispanic or Latino of any race were 3.5% of the population.

There were 1,124 households, of which 28.5% had children under the age of 18 living following them, 36.1% were married couples perky together, 15.1% had a female householder as soon as no husband present, 3.6% had a male householder in imitation of no wife present, and 45.2% were non-families. 40.2% of all households were made in the works of individuals, and 17.5% had someone living alone who was 65 years of age or older. The average household size was 2.16 and the average associates size was 2.85.

The median age in the city was 41.4 years. 21.3% of residents were below the age of 18; 9.4% were in the company of the ages of 18 and 24; 23.5% were from 25 to 44; 27.7% were from 45 to 64; and 18.1% were 65 years of age or older. The gender makeup of the city was 45.7% male and 54.3% female.