Onamia is located in Mille lacs county Minnesota with a geographic area of 1.0 square miles. The total population in Onamia is 929 with 48.4% male and 51.6% female. Children under age 5 represent 6.6% of the population, under age 18 equal 28.6% of the population and over age 65 is 25.0% of the population. The median household income is $30,592, per capita income is $18,618. There are a total of 383 housing units with 52.2% owner occupied. Education includes 34.5% of residents that are high school graduates and 15.1% with a bachelor's degree or higher. The average temperature in Onamia in the summer is 68 degrees, and in the winter 9 degrees.
