Saint-Isidore-de-Clifton (French pronunciation: [sɛ̃t‿izidɔʁ də kliftən]) is a municipality of 700 people in Le Haut-Saint-François Regional County Municipality, in Quebec, Canada on the Canada–United States border.

[4] The earliest known name for Saint-Isidore-d'Auckland was the name of Popeville, formed from the surname of Pope which the surname of the president of the Cookshire branch of the Standard Chemical Company.

The Auckland part of the name was added in 1806 and probably comes from a toponym added by William Eden, 1st Baron Auckland after he was named man of state commissioner in North America in 1778 in order to settle border disputes following American independence.

The post office was later established in 1911. the Municipality of Clifton-Partie-Est was named after the village of Clifton in Gloucestershire in 1799.

[6] Jean Perron, former trainer of the Montreal Canadiens was born in Saint-Isidore d'Auckland[7] before the merger of the two municipalities.