Dennison is a city in Goodhue and Rice counties in the U.S. state of Minnesota.

[5] The city was named for Morris P. Dennison, the original owner of the town site.

[6] According to the United States Census Bureau, the city has a total area of 1.26 square miles (3.26 km2), all land.

The racial makeup of the city was 92.5% White, 4.7% African American, and 2.8% from two or more races.

26.0% of all households were made up of individuals, and 5.2% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 91.67% White, 0.60% Native American, 1.79% Asian, and 5.95% from two or more races.