Orion Township is a township in Olmsted County, Minnesota, United States. The population was 614 at the 2000 census.

Orion Township was organized in 1858, and named after Orion, Wisconsin.

According to the United States Census Bureau, the township has a total area of 35.7 square miles (92.4 km), all land.

As of the census of 2000, there were 614 people, 226 households, and 176 families residing in the township. The population density was 17.2 people per square mile (6.6/km). There were 232 housing units at an average density of 6.5/sq mi (2.5/km). The racial makeup of the township was 96.58% White, 1.79% African American, 0.65% from other races, and 0.98% from two or more races. Hispanic or Latino of any race were 0.65% of the population.

There were 226 households, out of which 34.5% had children under the age of 18 living with them, 67.7% were married couples living together, 5.3% had a female householder with no husband present, and 21.7% were non-families. 17.7% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.08.

In the township the population was spread out, with 27.0% under the age of 18, 8.3% from 18 to 24, 28.0% from 25 to 44, 23.3% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 112.5 males. For every 100 females age 18 and over, there were 111.3 males.

The median income for a household in the township was $52,321, and the median income for a family was $56,932. Males had a median income of $39,028 versus $25,583 for females. The per capita income for the township was $24,533. About 2.3% of families and 4.3% of the population were below the poverty line, including none of those under age 18 and 17.9% of those age 65 or over.