Sinclair Lewis, the son of a doctor, Edwin J. Lewis, was born in Sauk Centre, Minnesota, on 7th February 1885. His mother, Emma Kermott Lewis, died when he was six.
In 1892 his father married Isabel Warner. Although he got on fairly well with his step-mother, at the age of thirteen he ran away from home, wanting to become a drummer boy in the Spanish-American War.
He was educated at Oberlin Academy and Yale University.