Janke (September 30, 1892 – July 3, 1975) was an American politician and businessman.
Born in Howards Grove, Wisconsin, Janke moved to Sheboygan, Wisconsin went to Sheboygan High School and Sheboygan Business College.
Janke was a public accountant and was in the real estate business.
He served on the Sheboygan Common Council.
Janke served in the Wisconsin State Assembly from 1929 to 1933 and was a Republican.