Dinsdale is a surname. It originates from two villages in County Durham in England: Lower and Upper Dinsdale. It means Danes (Vikings) Dale (Valley) but specifically relates to the two villages. Notable people with the surname include:
Dick Dinsdale, British newspaper editor George Dinsdale, British-born Canadian politician Bruce George Peter Lee (born as Peter George Dinsdale; 1960), prolific British serial killer, arsonist, and mass murderer Reece Dinsdale, British actor Robert Dinsdale, English novelist Shirley Dinsdale, American ventriloquist Sid Dinsdale, American banker Tim Dinsdale, filmed footage supposedly of the Loch Ness Monster Walter Dinsdale, Canadian politician