Simeon Morrill (August 11, 1793 – June 20, 1871) was an American-born businessman and politician in Ontario, Canada. He served as mayor of London in 1848 and from 1850 to 1851.^[1]

He was born in Vermont and grew up in Maine. Morrill worked as a tanner in Kingston, Upper Canada and came to London in 1829, setting up a tannery there. His business grew to include a shoe and boot factory, but in 1868 he was forced to declare insolvency. Morrill was a trustee of the London Savings’ Bank, a trustee of the London Gas Company and a director of the London and Port Stanley Railway. He was also a founding member of the London Board of Trade. In 1841, he was named a justice of the peace.^[1]

In 1844, Morrill was an unsuccessful candidate in a by-election for the London seat in the Legislative Assembly of the Province of Canada, losing to Lawrence Lawrason. He represented St Andrew's ward on London town council for a number of years and was the town's first mayor.^[1]

Morrill was also active in the local temperance society. He was married twice: first to Margaret Andrews and later to Eleanor Beach. He died in London at the age of 77.^[1]