[6] The Rum River flows through Isanti's western edge.

As of the census[7] of 2010, there were 5,251 people, 1,871 households, and 1,336 families living in the city.

20.6% of all households were made up of individuals, and 6.3% had someone living alone who was 65 years of age or older.

As of the census[3] of 2000, there were 2,324 people, 816 households, and 576 families living in the city.

22.8% of all households were made up of individuals, and 8.5% had someone living alone who was 65 years of age or older.

The Minnesota Owls were a Tier III junior hockey team based in Isanti.

It played in the Minnesota Junior Hockey League for over 20 seasons.