Plainfield Twp. is known for its suburban and rural areas. Running along the Rough River and Grand River Plainfield is home to many parks which house activities for all ages.
As of the census of 2000, there were 30,195 people, 11,038 households, and 8,168 families residing in the township. The population density was 859.2 per square mile (331.8/km²). There were 11,456 housing units at an average density of 326.0/sq mi (125.9/km²). The racial makeup of the township was 95.68% White, 1.22%African American, 0.32% Native American, 0.93% Asian, 0.04% Pacific Islander, 0.61% from other races, and 1.19% from two or more races. Hispanic or Latino of any race were 1.75% of the population.
There were 11,038 households out of which 39.9% had children under the age of 18 living with them, 62.3% were married couples living together, 8.7% had a female householder with no husband present, and 26.0% were non-families. 21.7% of all households were made up of individuals and 6.7% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.22.
In the township the population was spread out with 30.0% under the age of 18, 8.0% from 18 to 24, 29.9% from 25 to 44, 22.7% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 98.7 males. For every 100 females age 18 and over, there were 94.1 males.
The median income for a household in the township was $55,181, and the median income for a family was $62,241. Males had a median income of $45,757 versus $30,122 for females. The per capita income for the township was $23,753. About 3.3% of families and 4.2% of the population were below the poverty line, including 4.1% of those under age 18 and 5.1% of those age 65 or over.
Most Of The Southern Parts Of The Township Is Served By 49505 (Grand Rapids), Northern Parts Are Served By 49341 (Rockford), Western Parts Are Served By 49321 (Comstock Park), Central Portions are Served By 49306 (Belmont)
Most Of The Children Under 18 are Served By Northview Public Schools In The Southern Portions Of The Township, Western Portions are Served By Comstock Park Public Schools, Northern Portions are Served By Rockford Public Schools.
Information courtesy of wikipedia.org