4 in the Legislative Assembly of Quebec from 1890 to 1892 as a Conservative.
Born in Cavan, William Clendinneng arrived in Montreal with his family in 1847, at the young age of 14.
Clendinneng's son, William Jr., joined the business in 1884 as a partner, and the name was changed to The William Clendinneng & Son Company (Limited).
By 1886, the foundry's 450 workers made castings of all types, including: architectural and ornamental ironwork; agricultural and railway castings; drain and gas pipes; stoves, ranges, furnaces, and hollow ware; and household goods—the tools of the homestead farms and Canada's urbanization.
The foundry participated in the Great Crystal Palace Exhibition of 1851 in Britain and Paris' 1855 Exposition.
Canada's first industrial design was a Clendinneng double stove, registered in 1861.
The foundry also made the stately main gates and fence for Rideau Hall.
Under Clendinneng the business developed into the largest foundry in Canada.
He was a Conservative representative at the Legislative Assembly of Quebec from 1890 to 1892.
After the Clendinneng foundry ceased operations in 1904, Clendinneng left Montreal.
He died in Depew, New York at the age of 74 after being hit by a train.