| Official Name: | Grattan 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: | Itasca |
| Unit Pref: | Imperial |
| Area Total Km2: | 92.3 |
| Area Land Km2: | 90.0 |
| Area Water Km2: | 2.3 |
| Area Total Sq Mi: | 35.6 |
| Area Land Sq Mi: | 34.8 |
| Area Water Sq Mi: | 0.9 |
| Population As Of: | 2010 |
| Population Total: | 44 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 407 |
| Elevation Ft: | 1335 |
| Coordinates: | 47.8175°N -94.1019°W |
| Blank Name: | FIPS code |
| Blank Info: | 27-25460[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0664332[2] |
Grattan Township is a township in Itasca County, Minnesota, United States. The population was 44 at the 2010 census.[3]
Grattan Township was named for Henry Grattan, an Irish politician.[4]
According to the United States Census Bureau, the township has a total area of 35.6sqmi, of which 34.8sqmi is land and 0.9sqmi, or 2.44%, is water.
As of the census of 2000, there were 44 people, 16 households, and 13 families living in the township. The population density was 1.3sp=usNaNsp=us. There were 30 housing units at an average density of 0.9sp=usNaNsp=us. The racial makeup of the township was 97.73% White, 2.27% from other races. Hispanic or Latino of any race were 2.27% of the population.
There were 16 households, out of which 43.8% had children under the age of 18 living with them, 62.5% were married couples living together, 6.3% had a female householder with no husband present, and 18.8% were non-families. 18.8% of all households were made up of individuals, and 18.8% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.15.
In the township the population was spread out, with 27.3% under the age of 18, 9.1% from 18 to 24, 22.7% from 25 to 44, 20.5% from 45 to 64, and 20.5% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 131.6 males. For every 100 females age 18 and over, there were 128.6 males.
The median income for a household in the township was $36,250, and the median income for a family was $40,625. Males had a median income of $6,875 versus $3,750 for females. The per capita income for the township was $21,404. There were 15.4% of families and 13.5% of the population living below the poverty line, including no under eighteens and 40.0% of those over 64.