John George Marshall (1786 – April 7, 1880) was a lawyer, judge and political figure in Nova Scotia, Canada.
He was born in Country Harbour, Nova Scotia, the son of Captain Joseph Marshall.
Marshall resigned his seat in 1823 after he was named chief justice of the Inferior Court of Common Pleas.
He also served as president of the Courts of General and Special Sessions and justice of the peace for Cape Breton.
He published The justice of the peace, and county & township officer, in the province of Nova Scotia, a textbook for local magistrates.