The municipality covers the entire central part of the Södertörn peninsula. More than half of the land area consists of agriculture, forests, hills, or lakes, and it contains seven nature reserves.

Huddinge borders the following municipalities: , Ekerö Municipality (by water), Botkyrka Municipality, Haninge Municipality and Tyresö Municipality (by water).

Huddinge has a total population of roughly 100,000, or 4.5% of the population of Stockholm County. The average age is 36.7 years, but one-third of the population is under 25 years of age. This means that Huddinge has a slightly younger population than both Stockholm County (38.9 years) and the whole country (40.6 years). The population density of the municipality is increasing significantly. Since the 1960s, the population has doubled in size and is currently among the 14 largest municipalities in Sweden. The population of Huddinge passed the one of Gävle in 2008, and the ones of Eskilstuna and Sundsvall as well in 2009.

It is believed that the history of Huddinge goes back at least 1,000 years, to before the Viking Age. When hostile ships approached the community, the inhabitants of Huddinge would climb to high locations and light beacons. Beacons were located around the entirety of Lake Mälaren. Huddinge's coat of arms has its origins in this tradition. The name Huddinge is believed to come from the Uddung's - the first inhabitants in this area, which during the Iron Age lived on the shores of Lake Mälaren nearby Vårby.

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Wikipedia