Elijah Leonard (September 10, 1814 – May 14, 1891) was an Ontario businessman and political figure.
He was born on a farm near Syracuse, New York in 1814, the son of Elijah Leonard.
In 1830, he moved with his family to Normandale in Upper Canada, where his father was working at a foundry owned by Joseph Van Norman.
The company now known as E. Leonard and Sons, went on to manufacture steam boilers and steam-powered equipment.
In 1862, he was elected to the Legislative Council of the Province of Canada for Malahide division; Leonard was named to the Senate after Confederation.