| Official Name: | Boy Lake Township, Minnesota |
| Settlement Type: | Township |
| Pushpin Map: | Minnesota#USA |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Minnesota |
| Coordinates: | 47.0967°N -94.1964°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name1: | Minnesota |
| Subdivision Name2: | Cass |
| Unit Pref: | Imperial |
| Area Total Km2: | 94.1 |
| Area Total Sq Mi: | 36.3 |
| Area Land Km2: | 71.5 |
| Area Land Sq Mi: | 27.6 |
| Area Water Km2: | 22.6 |
| Area Water Sq Mi: | 8.7 |
| Elevation M: | 395 |
| Elevation Ft: | 1296 |
| Population Total: | 132 |
| Population As Of: | 2000 |
| Population Density Km2: | 1.8 |
| Population Density Sq Mi: | 4.8 |
| Postal Code Type: | ZIP code |
| Postal Code: | 56655 |
| Area Code: | 218 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Blank Name: | FIPS code |
| Blank Info: | 27-07156[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0663642[2] |
Boy Lake Township is a township in Cass County, Minnesota, United States. The population was 132 as of the 2000 census.[3] This township took its name from Boy Lake.[4]
According to the United States Census Bureau, the township has a total area of 36.3sqmi, of which 27.6sqmi is land and 8.7sqmi (24.01%) is water.
As of the census of 2000, there were 132 people, 58 households, and 36 families residing in the township. The population density was 4.8sp=usNaNsp=us. There were 204 housing units at an average density of 7.4sp=usNaNsp=us. The racial makeup of the township was 81.82% White, 0.76% African American, 6.82% Native American, 0.76% Asian, and 9.85% from two or more races. Hispanic or Latino of any race were 1.52% of the population.
There were 58 households, out of which 19.0% had children under the age of 18 living with them, 53.4% were married couples living together, 6.9% had a female householder with no husband present, and 37.9% were non-families. 29.3% of all households were made up of individuals, and 20.7% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.81.
In the township the population was spread out, with 16.7% under the age of 18, 4.5% from 18 to 24, 22.7% from 25 to 44, 29.5% from 45 to 64, and 26.5% who were 65 years of age or older. The median age was 48 years. For every 100 females, there were 116.4 males. For every 100 females age 18 and over, there were 115.7 males.
The median income for a household in the township was $37,500, and the median income for a family was $36,250. Males had a median income of $34,583 versus $21,250 for females. The per capita income for the township was $20,070. There were 27.8% of families and 26.7% of the population living below the poverty line, including 68.8% of under eighteens and 6.7% of those over 64.