Mont Saint-Hilaire (in English: Mount Saint-Hilaire) (in Abenaki: Wigwômadenizibo), is an isolated hill, 414 m (1,358 ft) high, in the Montérégie region of southern Quebec. It is about thirty kilometres east of Montreal, and immediately east of the Richelieu River. It is one of the Monteregian Hills. Around the mountains are the towns of Mont-Saint-Hilaire and Saint-Jean-Baptiste. Other nearby towns include Otterburn Park, Beloeil and McMasterville.

Until the late nineteenth century, the lack of information on more remote summits of Quebec, as well as the relatively high prominence (about 400 m (1,312 ft)) of Mont Saint-Hilaire, led to it being mistaken as the highest summit in Québec. In actuality, Saint-Hilaire's 414 metres falls far short of making it the highest mountain in Quebec.

Mont Saint-Hilaire is home to a wide variety of fauna and flora, as well as a number of rare minerals, including some which were discovered on the mountain and some which are unique to the region. These minerals are exploited by a quarry on the north-eastern side of the mountain. In addition, the soil is ideal for the growth of apple trees, and the mountain's apple orchards draws tens of thousands of visitors each year.

The mountain, particularly the Pain-de-Sucre summit, was well known by the Algonquin First Nations, who used it as a vantage point to survey the valley of the Richelieu River below.  The mountain is located in Abenaki traditional territory and its name, Wigwômadenizibo, which means little house-shaped mountain. The first European to visit the region was Samuel de Champlain, who explored the Richelieu River in two expeditions in 1603 and 1609. It was during the later expedition that he discovered the mountain.