| Official Name: | Otsego Lake Township, Michigan |
| Settlement Type: | Civil township |
| Pushpin Map: | Michigan#USA |
| Pushpin Label Position: | left |
| Pushpin Label: | Otsego Lake Township |
| Pushpin Map Caption: | Location within the state of Michigan##Location within the United States |
| Mapsize: | 250 |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Otsego |
| Leader Title: | Supervisor |
| Leader Name: | Dave Matelski |
| Leader Title1: | Clerk |
| Leader Name1: | Mary Brown |
| Established Title: | Established |
| Established Date: | 1875 |
| Unit Pref: | Imperial |
| Area Total Km2: | 91.74 |
| Area Land Km2: | 84.74 |
| Area Water Km2: | 6.99 |
| Area Total Sq Mi: | 35.42 |
| Area Land Sq Mi: | 32.72 |
| Area Water Sq Mi: | 2.70 |
| Population As Of: | 2020 |
| Population Total: | 2857 |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 433 |
| Elevation Ft: | 1421 |
| Coordinates: | 44.9036°N -84.6706°W |
| Postal Code Type: | ZIP code(s) |
| Postal Code: | 49733 (Frederic) 49735 (Gaylord) 49797 (Waters) |
| Area Code: | 989 |
| Blank Name: | FIPS code |
| Blank Info: | 26-61680[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1626870 |
Otsego Lake Township is a civil township of Otsego County in the U.S. state of Michigan. The population was 2,857 at the 2020 census.[2]
The township takes its name from Otsego Lake, in which the southern half is within the township. Otsego Lake State Park is located in the township on the southeast shore of the lake.
According to the U.S. Census Bureau, the township has a total area of 35.42sqmi, of which 32.72sqmi is land and 2.7sqmi (7.62%) is water.
As of the census of 2000, there were 2,532 people, 1,070 households, and 786 families residing in the township. The population density was 77.3sp=usNaNsp=us. There were 2,028 housing units at an average density of 61.9sp=usNaNsp=us. The racial makeup of the township was 98.30% White, 0.12% African American, 0.36% Native American, 0.04% from other races, and 1.18% from two or more races. Hispanic or Latino of any race were 0.32% of the population.
There were 1,070 households, out of which 26.4% had children under the age of 18 living with them, 64.6% were married couples living together, 5.2% had a female householder with no husband present, and 26.5% were non-families. 22.1% of all households were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.74.
In the township the population was spread out, with 22.3% under the age of 18, 4.4% from 18 to 24, 25.0% from 25 to 44, 27.8% from 45 to 64, and 20.5% who were 65 years of age or older. The median age was 44 years. For every 100 females, there were 107.0 males. For every 100 females age 18 and over, there were 101.1 males.
The median income for a household in the township was $44,351, and the median income for a family was $50,403. Males had a median income of $36,927 versus $24,375 for females. The per capita income for the township was $23,350. About 4.5% of families and 6.5% of the population were below the poverty line, including 10.4% of those under age 18 and 2.7% of those age 65 or over.