 Those of Hispanic or Latino origin made up 3.1% of the population.In terms of ancestry, 26.6% were German, 12.2% were English, 10.1% were Irish, and 8.4% were American.Of the 6,427 households, 30.4% had children under the age of 18 living with them, 53.6% were married couples living together, 9.1% had a female householder with no husband present, 32.5% were non-families, and 26.8% of all households were made up of individuals.