John Peter Steinbrink Sr. (born April 17, 1949) is an American politician and was a Democratic Party member of the Wisconsin State Assembly, representing the southeastern part of Kenosha County for eight terms, from 1997 until 2013.
Born in Kenosha, Wisconsin, Steinbrink graduated from George Nelson Tremper High School.
He has served continuously on the Pleasant Prairie, Wisconsin board since 1985, bridging the 1989 transition from Town to Village.
However, in 2011 the new Republican majority used their power to redraw the state's legislative maps, and Steinbrink was one of eleven Democrats who were drawn out of their old districts entirely.
Steinbrink was forced to run against incumbent Republican Samantha Kerkman in the 61st District and lost by ten points.