Ayer's Cliff
Village municipality
Location within Memphrémagog RCM.
Ayer's Cliff Location in southern Quebec.
Coordinates: 45°10′N 72°03′W / 45.167°N 72.050°W / 45.167; -72.050[1]
Country	Canada
Province	Quebec
Region	Estrie
RCM	Memphrémagog
Settled	1815
Constituted	February 4, 1909
Government [2][3]
• Mayor	Simon Roy
• Federal riding	Compton—Stanstead
• Prov. riding	Orford
Area [2][4]
• Total	5.50 km2 (2.12 sq mi)
• Land	5.53 km2 (2.14 sq mi)
	There is an apparent contradiction between two authoritative sources
Population  (2021)[4]
• Total	1,197
• Density	213.3/km2 (552/sq mi)
• Pop 2016-2021	10%
• Dwellings	643
Demonym	Ayer's Cliffer
Time zone	UTC−5 (EST)
• Summer (DST)	UTC−4 (EDT)
Postal code(s)	J0B 1C0
Area code	819
Highways	R-141 R-208
Census profile	[1][4]
MAMROT info	45035[2]
Toponymie info	142204[1]
Website	www.ayerscliff.ca

Ayer's Cliff (2021 population 1,180) is a village municipality in the Memphrémagog Regional County Municipality in the Estrie region of Quebec. It is located just north of the Canada–United States border, on Lake Massawippi, near the mouth of the Tomifobia River.

In the early 1910s and 1920s a number of wealthy Americans built summer estates in Ayer's Cliff. These included the railroad mogul Charles Keller Beekman, Chicago attorney David Leavitt Hough, Charles W. Parker, and George Fuller Parker, a close friend of President Grover Cleveland.

Ayer's Cliff still maintains a large anglophone population, with roots going back to the late 18th century. Today, Ayer's Cliff and the surrounding region are home to a combination of seasonal and year-round residents. The village is the site of Ripplecove Inn, a world-renowned luxury resort featured on CTV Travel's Most Romantic Hideaways.

The annual Ayer's Cliff Fair has been a popular gathering place for Eastern Townshippers since 1845. It is a multi-day event that includes animal shows, rides, attractions and entertainment for all.

In the 2021 Census of Population conducted by Statistics Canada, Ayer's Cliff had a population of 1,180 living in 531 of its 643 total private dwellings, a change of 10% from its 2016 population of 1,073. With a land area of 5.53 km² (2.14 sq mi), it had a population density of 213.4/km² (552.7/sq mi) in 2021.^[5]

• During the 1930s, multi-millionaire sportsman Foxhall P. Keene maintained a seasonal residence in Ayer's Cliff where he died in 1941.
• American novelist and essayist Upton Sinclair also spent time in Ayer's Cliff in the 1930s.

• Ayer's Cliff Fair
• List of anglophone communities in Quebec
• List of village municipalities in Quebec
• Tomifobia River
• Wulftec International