When William P. Wimmer was born on 29 August 1794, in Floyd, Virginia, United States, his father, John Wimmer, was 24 and his mother, Johanna Malinda Lehman, was 18. He married Sarah Templeton in 1815, in Virginia, United States. They were the parents of at least 5 sons and 5 daughters. He lived in Union Township, Union, Indiana, United States for about 20 years. He died on 23 June 1888, in Converse, Grant, Indiana, United States, at the age of 93, and was buried in Converse, Grant, Indiana, United States.