| Official Name: | Pine Lake 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: | 92.6 |
| Area Land Km2: | 75.5 |
| Area Water Km2: | 17.0 |
| Area Total Sq Mi: | 35.7 |
| Area Land Sq Mi: | 29.2 |
| Area Water Sq Mi: | 6.6 |
| Population As Of: | 2000 |
| Population Total: | 656 |
| Population Density Km2: | 8.7 |
| Population Density Sq Mi: | 22.5 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 406 |
| Elevation Ft: | 1332 |
| Coordinates: | 46.5986°N -95.4747°W |
| Blank Name: | FIPS code |
| Blank Info: | 27-51208[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0665307[2] |
Pine Lake Township is a township in Otter Tail County, Minnesota, United States. The population was 656 at the 2000 census.
Pine Lake Township was organized in 1883, and named for Pine Lake.[3]
According to the United States Census Bureau, the township has a total area of 35.7 square miles (92.6 km), of which 29.2 square miles (75.5 km) is land and 6.6 square miles (17.0 km) (18.38%) is water.
As of the census of 2000, there were 656 people, 252 households, and 187 families residing in the township. The population density was 22.5 people per square mile (8.7/km). There were 563 housing units at an average density of 19.3/sq mi (7.5/km). The racial makeup of the township was 99.39% White, 0.15% Asian, and 0.46% from two or more races.
There were 252 households, out of which 32.9% had children under the age of 18 living with them, 65.1% were married couples living together, 4.8% had a female householder with no husband present, and 25.4% were non-families. 20.2% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 2.99.
In the township the population was spread out, with 26.4% under the age of 18, 6.3% from 18 to 24, 24.7% from 25 to 44, 29.0% from 45 to 64, and 13.7% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 104.4 males. For every 100 females age 18 and over, there were 104.7 males.
The median income for a household in the township was $43,056, and the median income for a family was $50,938. Males had a median income of $34,063 versus $22,875 for females. The per capita income for the township was $19,878. About 3.1% of families and 6.8% of the population were below the poverty line, including 9.0% of those under age 18 and 10.8% of those age 65 or over.