| Official Name: | Bluffton Township, Minnesota |
| 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: | Otter Tail |
| Unit Pref: | Imperial |
| Area Total Km2: | 85.4 |
| Area Land Km2: | 85.4 |
| Area Water Km2: | 0.1 |
| Area Total Sq Mi: | 33.0 |
| Area Land Sq Mi: | 33.0 |
| Area Water Sq Mi: | 0.0 |
| Population As Of: | 2000 |
| Population Total: | 474 |
| Population Density Km2: | 5.6 |
| Population Density Sq Mi: | 14.4 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 426 |
| Elevation Ft: | 1398 |
| Coordinates: | 46.4897°N -95.2264°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 56518 |
| Area Code: | 218 |
| Blank Name: | FIPS code |
| Blank Info: | 27-06796[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0663629[2] |
Bluffton Township is a township in Otter Tail County, Minnesota, United States. The population was 474 at the 2000 census.
Bluffton Township was organized in 1878 and named for the bluffs on the Leaf River.[3]
According to the United States Census Bureau, the township has a total area of 33sqmi, of which 33sqmi is land and 0.04sqmi (0.09%) is water.
As of the census of 2000, there were 474 people, 168 households, and 131 families residing in the township. The population density was 14.4sp=usNaNsp=us. There were 180 housing units at an average density of 5.5sp=usNaNsp=us. The racial makeup of the township was 99.16% White, 0.21% Asian, 0.21% from other races, and 0.42% from two or more races. Hispanic or Latino of any race were 0.42% of the population.
There were 168 households, out of which 39.3% had children under the age of 18 living with them, 67.3% were married couples living together, 5.4% had a female householder with no husband present, and 22.0% were non-families. 16.1% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.19.
In the township, the population was spread out, with 28.9% under the age of 18, 9.5% from 18 to 24, 24.7% from 25 to 44, 26.2% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 111.6 males. For every 100 females age 18 and over, there were 114.6 males.
The median income for a household in the township was $45,179, and the median income for a family was $48,611. Males had a median income of $28,897 versus $17,143 for females. The per capita income for the township was $18,379. About 5.8% of families and 8.3% of the population were below the poverty line, including 13.3% of those under age 18 and 12.2% of those age 65 or over.