Out of the 462 households located in Grass Lake, 36.4% contained children under the age of 18, 52.4% were married couples living together, 10.8% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 33.8% were non-families. 27.7% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older. The average household size was 2.54 people and the average family size was 3.13 people.
Out of the 462 households located in Grass Lake, 36.4% contained children under the age of 18, 52.4% were married couples living together, 10.8% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 33.8% were non-families. 27.7% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older. The average household size was 2.54 people and the average family size was 3.13 people.