| Official Name: | Three Oaks Township, Michigan |
| Settlement Type: | Civil township |
| Seal Type: | logo |
| Seal Size: | 150 |
| Pushpin Map: | Michigan#USA |
| Pushpin Label Position: | top |
| Pushpin Label: | Three Oaks Township |
| Pushpin Map Caption: | Location within the state of Michigan |
| Mapsize: | 250 |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Berrien |
| Leader Title: | Supervisor |
| Unit Pref: | Imperial |
| Area Total Km2: | 60.8 |
| Area Land Km2: | 60.3 |
| Area Water Km2: | 0.5 |
| Population As Of: | 2020 |
| Population Total: | 2324 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 207 |
| Elevation Ft: | 679 |
| Coordinates: | 41.7983°N -86.6153°W |
| Postal Code Type: | ZIP code(s) |
| Postal Code: | 49128 |
| Area Code: | 269 |
| Blank Name: | FIPS code |
| Blank Info: | 26-79740[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1627163 |
Three Oaks Township is a civil township of Berrien County in the U.S. state of Michigan on the border with the state of Indiana. The population was 2,324 at the 2020 census.[2]
The village of Three Oaks is the only incorporated community within the township.
US 12 crosses east–west through the township. The South Branch Galien River flows through the western part of the township.
According to the United States Census Bureau, the township has a total area of 60.8km2, of which 60.3km2 is land and 0.5km2, or 0.79%, is water.[3]
At the 2000 census there were 2,949 people, 1,181 households, and 816 families in the township. The population density was 126.1sp=usNaNsp=us. There were 1,284 housing units at an average density of 54.9sp=usNaNsp=us. The racial makeup of the township was 96.81% White, 0.88% African American, 0.47% Native American, 0.10% Asian, 0.41% from other races, and 1.32% from two or more races. Hispanic or Latino of any race were 1.63%.
Of the 1,181 households, 31.6% had children under the age of 18 living with them, 53.6% were married couples living together, 11.1% had a female householder with no husband present, and 30.9% were non-families. 26.1% of households were one person, and 11.2% were one person aged 65 or older. The average household size was 2.50 and the average family size was 3.02.
In the township the population was spread out, with 25.6% under the age of 18, 8.3% from 18 to 24, 27.8% from 25 to 44, 24.3% from 45 to 64, and 14.0% 65 or older. The median age was 37 years. For every 100 females, there were 97.1 males. For every 100 females age 18 and over, there were 93.2 males.
The median household income was $36,989 and the median family income was $45,302. Males had a median income of $31,908 versus $21,745 for females. The per capita income for the township was $17,901. About 7.1% of families and 9.9% of the population were below the poverty line, including 15.3% of those under age 18 and 3.9% of those age 65 or over.