Loppi is a municipality in Finland. It is located in the province of Southern Finland and is part of the Kanta-Häme region, located about 50 kilometers south of the city of Hämeenlinna. Loppi was founded in 1632. The municipality has a population of 7,692 and covers an area of 655.97 square kilometres (253.27 sq mi) of which 58.36 km2 (22.53 sq mi) is water. The population density is 12.87 inhabitants per square kilometre (33.3/sq mi). The municipality is unilingually Finnish.

Kanta-Häme, sometimes referred to by the obsolete Tavastia Proper or as the Häme region, is a region of Finland. It borders the regions of Southwest Finland, Pirkanmaa, Päijät-Häme, and Uusimaa.