| Official Name: | Isle Harbor 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: | Mille Lacs |
| Unit Pref: | Imperial |
| Area Total Km2: | 83.3 |
| Area Land Km2: | 70.2 |
| Area Water Km2: | 13.0 |
| Area Total Sq Mi: | 32.2 |
| Area Land Sq Mi: | 27.1 |
| Area Water Sq Mi: | 5.0 |
| Population As Of: | 2010 |
| Population Total: | 593 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 387 |
| Elevation Ft: | 1270 |
| Coordinates: | 46.1267°N -93.5094°W |
| Blank Name: | FIPS code |
| Blank Info: | 27-31490[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0664565[2] |
Isle Harbor Township is a township in Mille Lacs County, Minnesota, United States. The population was 593 at the 2010 census.[3]
Isle Harbor Township was named for the island near its harbor on Mille Lacs Lake.[4]
According to the United States Census Bureau, the township has a total area of 32.2sqmi, of which 27.1sqmi is land and 5sqmi, or 15.68%, is water.[5]
As of the census of 2000, there were 590 people, 240 households, and 169 families residing in the township. The population density was 21.8sp=usNaNsp=us. There were 382 housing units at an average density of 14.1sp=usNaNsp=us. The racial makeup of the township was 96.95% White, 0.17% African American, 2.71% Native American, and 0.17% from two or more races. Hispanic or Latino of any race were 0.68% of the population.
There were 240 households, out of which 27.1% had children under the age of 18 living with them, 62.9% were married couples living together, 4.6% had a female householder with no husband present, and 29.2% were non-families. 22.9% of all households were made up of individuals, and 10.0% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.84.
In the township, the population was spread out, with 23.1% under the age of 18, 5.4% from 18 to 24, 25.3% from 25 to 44, 29.5% from 45 to 64, and 16.8% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 98.0 males. For every 100 females age 18 and over, there were 101.8 males.
The median income for a household in the township was $40,556, and the median income for a family was $48,333. Males had a median income of $34,688 versus $19,167 for females. The per capita income for the township was $17,493. About 3.2% of families and 3.9% of the population were below the poverty line, including 1.1% of those under age 18 and 7.5% of those age 65 or over.