John Niebler (born November 4, 1941) is an American politician and attorney who served as a member of the Wisconsin State Assembly from 1972 to 1974.
Niebler earned a Bachelor of Arts degree from Marquette University and a Juris Doctor from the University of Wisconsin Law School.
After graduating from law school, Niebler worked as a legislative intern and Wisconsin Supreme Court clerk.
Additionally, he was a member of the Waukesha County, Wisconsin Board of Supervisors from 1966 to 1972.
Since leaving the Assembly, Niebler has worked as an attorney.