| Plainwell High School | |
| Motto: | "Preparing students for success through academic excellence and strength of character" |
| Location: | 684 Starr Road |
| Zipcode: | 49080 |
| District: | Plainwell Community Schools |
| Superintendent: | Matt Montange |
| Principal1: | Jeremy Wright |
| Teaching Staff: | 42.20 (FTE) |
| Grades: | 9-12 |
| Gender: | Co-ed |
| Enrollment: | 815 (2022–2023)[1] |
| Ratio: | 19.31 |
| Colors: | Royal Blue White |
| Athletics: | MHSAA Class B |
| Nickname: | Trojans |
| Yearbook: | Troan |
| Feeders: | Plainwell Middle School |
| Free Label1: | Athletic Director |
| Free Text1: | Dave Price |
| Url: | Plainwell High School |
| Year: | 2021 - 22 |
| M-Step Advanced: | 29.4 / 13.1 |
| M-Step Proficient: | 31.9 / 34.4 |
| M-Step Pr Proficient: | 11.9 / - |
| M-Step Not Proficient: | 26.9 / ≤5 |
| Sat Total: | 1019.4 |
| Sat Total Change: | 17.1 |
| Ref: | [2] |
Plainwell High School is a high school located in Plainwell, Michigan. Approximately 200 students graduate from Plainwell High School per year. The school is in a suburban school district just outside Kalamazoo, Michigan and is located in Allegan County. The school's motto is: "Preparing students for success through academic excellence and strength of character."