| Official Name: | Maine Township |
| Settlement Type: | Township |
| Image Map1: | Map of Illinois highlighting Grundy County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Grundy County's location in Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Grundy |
| Established Title: | Established |
| Established Date: | March 18, 1898 |
| Area Total Sq Mi: | 18.07 |
| Area Land Sq Mi: | 17.89 |
| Area Water Sq Mi: | 0.18 |
| Area Water Percent: | 0.99 |
| Population As Of: | 2020 |
| Population Total: | 293 |
| Population Density Sq Mi: | auto |
| Elevation M: | 170 |
| Elevation Ft: | 558 |
| Coordinates: | 41.2444°N -88.3317°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 60416, 60424, 60444 |
| Blank Name: | FIPS code |
| Blank Info: | 17-063-46175 |
| Unit Pref: | Imperial |
Maine Township is one of seventeen townships in Grundy County, Illinois, USA. As of the 2020 census, its population was 293 and it contained 125 housing units.[1]
According to the 2021 census gazetteer files, Maine Township has a total area of 18.07sqmi, of which 17.89sqmi (or 99.01%) is land and 0.18sqmi (or 0.99%) is water.[2]
(This list is based on USGS data and may include former settlements.)
As of the 2020 census there were 293 people, 82 households, and 68 families residing in the township. The population density was 16.22PD/sqmi. There were 125 housing units at an average density of 6.92/sqmi. The racial makeup of the township was 93.86% White, 1.02% African American, 0.00% Native American, 0.68% Asian, 0.00% Pacific Islander, 0.00% from other races, and 4.44% from two or more races. Hispanic or Latino of any race were 5.46% of the population.
There were 82 households, out of which 8.50% had children under the age of 18 living with them, 82.93% were married couples living together, 0.00% had a female householder with no spouse present, and 17.07% were non-families. 17.10% of all households were made up of individuals, and 0.00% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 2.85.
The township's age distribution consisted of 8.7% under the age of 18, 16.3% from 18 to 24, 9.6% from 25 to 44, 40.9% from 45 to 64, and 24.5% who were 65 years of age or older. The median age was 53.5 years. For every 100 females, there were 123.7 males. For every 100 females age 18 and over, there were 123.5 males.
The median income for a household in the township was $136,818, and the median income for a family was $160,250. Males had a median income of $62,232 versus $33,594 for females. The per capita income for the township was $49,157. None of the population was below the poverty line.