Lawrence J. Timmerman (August 11, 1878 – October 5, 1959) was an American politician and lawyer.
Born in Milwaukee, Wisconsin, he worked in the United States Post Office as a Railway Postal Clerk.
In 1923, Timmerman served in the Wisconsin State Assembly and was a Republican.
His son was Lawrence W. Timmerman who also served in the Wisconsin Assembly and the Milwaukee County Board of Supervisors.
This article about a member of the Wisconsin State Assembly is a stub.