| Official Name: | Portland Township, Michigan |
| Settlement Type: | Township |
| Pushpin Map: | Michigan#USA |
| Pushpin Label: | Portland Township |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Ionia |
| Unit Pref: | Imperial |
| Area Total Km2: | 86.8 |
| Area Land Km2: | 84.0 |
| Area Water Km2: | 2.8 |
| Area Total Sq Mi: | 33.5 |
| Area Land Sq Mi: | 32.4 |
| Area Water Sq Mi: | 1.1 |
| Population As Of: | 2020 |
| Population Total: | 3881 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 239 |
| Elevation Ft: | 784 |
| Coordinates: | 42.8828°N -84.9133°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 48875 |
| Area Code: | 517 |
| Blank Name: | FIPS code |
| Blank Info: | 26-65880[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1626935 |
Portland Township is a civil township of Ionia County in the U.S. state of Michigan. The population was 3,881 at the 2020 census.[2] The City of Portland is situated in the south central portion of the township, but is administratively autonomous.
According to the United States Census Bureau, the township has a total area of 33.5sqmi, of which 32.4sqmi is land and 1.1sqmi (3.19%) is water.
As of the census of 2000, there were 2,460 people, 828 households, and 678 families residing in the township. The population density was 75.8sp=usNaNsp=us. There were 855 housing units at an average density of 26.4sp=usNaNsp=us. The racial makeup of the township was 98.29% White, 0.41% Native American, 0.12% Asian, 0.65% from other races, and 0.53% from two or more races. Hispanic or Latino of any race were 1.91% of the population.
There were 828 households, out of which 43.0% had children under the age of 18 living with them, 72.8% were married couples living together, 5.3% had a female householder with no husband present, and 18.0% were non-families. 14.4% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older. The average household size was 2.97 and the average family size was 3.29.
In the township the population was spread out, with 30.9% under the age of 18, 7.6% from 18 to 24, 29.8% from 25 to 44, 25.0% from 45 to 64, and 6.6% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 104.3 males. For every 100 females age 18 and over, there were 102.0 males.
The median income for a household in the township was $59,700, and the median income for a family was $63,125. Males had a median income of $45,230 versus $29,784 for females. The per capita income for the township was $23,792. About 3.9% of families and 3.6% of the population were below the poverty line, including 2.6% of those under age 18 and 8.9% of those age 65 or over.