The average household size was 3.00 and the average family size was 3.29. In the township the population was spread out, with 30.7% under the age of 18, 7.1% from 18 to 24, 32.1% from 25 to 44, 22.9% from 45 to 64, and 7.2% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 106.5 males. For every 100 females age 18 and over, there were 105.8 males. The median income for a household in the township was $61,063, and the median income for a family was $65,000. Males had a median income of $46,824 versus $29,931 for females. The per capita income for the township was $21,767. About 2.5% of families and 3.7% of the population were below the poverty line, including 4.1% of those under age 18 and 2.8% of those age 65 or over. The township has two parks. Columbus County Park is a 385-acre park that straddles Belle River. It offers fishing, hunting, hiking, sledding, kayaking, and horseback riding opportunities. It also includes a lodge. Funding to purchase Columbus County Park was made possible with a $2.23 million grant from the Michigan Natural Resources Trust Fund. The township's other park is a small roadside park on Gratiot Avenue located alongside the Belle River. Monastery of All Serbian Saints is located at 1712 Hessen Road in Columbus Township, St. Clair County in Michigan. The monastery, in the care of Protosyncellus Damjan, is under the jurisdiction of Artemije Radosavljević, bishop of the Eparchy of Raška and Prizren in exile. It is independent of the Serbian Orthodox Church, however, the liturgical service is identical.