Jenison is a census-designated place (CDP) located in Ottawa County within the state of Michigan, United States. It is situated specifically within Georgetown Charter Township.
As of the 2020 census, Jenison had a recorded population of 16,640 residents. The community is associated with the ZIP code 49428, which has an estimated population of 26,156; however, the geographical boundaries of this ZIP code are larger than those of the CDP itself.