| Official Name: | Ottawa Township |
| Settlement Type: | Township |
| Pushpin Map: | Minnesota#USA |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Minnesota |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Minnesota |
| Subdivision Type2: | County |
| Subdivision Name2: | Le Sueur |
| Unit Pref: | Imperial |
| Area Total Km2: | 39.7 |
| Area Land Km2: | 39.1 |
| Area Water Km2: | 0.6 |
| Area Total Sq Mi: | 15.3 |
| Area Land Sq Mi: | 15.1 |
| Area Water Sq Mi: | 0.2 |
| Population As Of: | 2000 |
| Population Total: | 290 |
| Population Density Km2: | 7.4 |
| Population Density Sq Mi: | 19.2 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 262 |
| Elevation Ft: | 860 |
| Coordinates: | 44.4061°N -93.9214°W |
| Blank Name: | FIPS code |
| Blank Info: | 27-49174[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0665238[2] |
Ottawa Township is a township in Le Sueur County, Minnesota, United States. The population was 290 at the 2000 census. Ottawa Township was organized in 1858.[3]
The unincorporated community of Ottawa is located within Ottawa Township.
According to the United States Census Bureau, the township has a total area of 15.3 square miles (39.7 km), of which 15.1 square miles (39.1 km) is land and 0.2 square mile (0.6 km) (1.50%) is water.
As of the census of 2000, there were 290 people, 122 households, and 89 families residing in the township. The population density was 19.2 people per square mile (7.4/km). There were 127 housing units at an average density of 8.4/sq mi (3.2/km). The racial makeup of the township was 97.59% White, 0.69% Asian, 1.72% from other races. Hispanic or Latino of any race were 1.72% of the population.
There were 122 households, out of which 26.2% had children under the age of 18 living with them, 67.2% were married couples living together, 4.1% had a female householder with no husband present, and 27.0% were non-families. 23.0% of all households were made up of individuals, and 9.0% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.80.
In the township the population was spread out, with 23.8% under the age of 18, 2.8% from 18 to 24, 30.3% from 25 to 44, 29.0% from 45 to 64, and 14.1% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 105.7 males. For every 100 females age 18 and over, there were 104.6 males.
The median income for a household in the township was $48,750, and the median income for a family was $56,563. Males had a median income of $31,618 versus $31,875 for females. The per capita income for the township was $22,908. About 2.6% of families and 3.3% of the population were below the poverty line, including none of those under the age of eighteen and 5.1% of those 65 or over.