Edwin Perry Mann was born around May 1839 in Elgin, Illinois. By the early 1860s, he was working as a farmer in Shirland, Illinois.
He enlisted in the Union army, and he mustered in as a private in Company A of the 7th Illinois Infantry on September 25, 1861. According to his service records, he was 5 feet, 11 inches tall, with light hair and blue eyes. The regiment took part in the Battle of Fort Donelson and the Battle of Shiloh. It is unclear how long he remained in the army.
He returned to Illinois after leaving the army, and he married Ellen Brooks on December 26, 1865. They had four children: Lucy, born around 1867; Frank, born around 1870; Earnest, born around 1871; and Everett, born around 1877. The family moved to Chicago, Illinois, around 1872, and he joined the city police force three years later. He applied for a federal pension in January 1879 and eventually received one.
He also joined the Grand Army of the Republic, and by 1897, he was serving as commander of the Godfrey Weitzel Post. In October 1900, he received an appointment as a customs inspector. He died in Chicago on January 15, 1905.