Peter Shaver (September 27, 1776 – June 21, 1866) was a farmer, businessman and political figure in Upper Canada.

He was born in Montgomery County, New York in 1776, the son of a German immigrant (the family name was originally spelled Schaeffer).

His father was a loyalist who served with the British forces during the American Revolution and settled in Matilda Township in Dundas County, Upper Canada after the war.

He later reached the rank of lieutenant-colonel and commanded the 3rd Battalion, Dundas Militia from 1846-1850s.

He was elected to the Legislative Assembly of Upper Canada in 1820 for Dundas and was reelected in 1828 and served until 1841.