Frank J. Lingelbach (July 7, 1888 – June 7, 1947) was an American businessman and politician.

Born inSheboygan, Wisconsin, Lingelbach grew up inOconto, Wisconsin. He went to Green Bay Business College and was in the insurance and real estate business. From 1927 to 1934, Lingelbach served on theOconto County, Wisconsin Board of Supervisors and was chairman of the board. In 1937, Lingelbach served in theWisconsin State Assembly and was aDemocrat. Lingelbach died of a heart attack at his home in Oconto, Wisconsin.^[1][2]