A mobile home (in the United States; also called a trailer or house trailer) or a static caravan (in other countries; also called a caravan) is a prefabricated home built in a factory, rather than on site, and then taken to the place where it will be occupied. Being built on a permanently attached chassis with highway-grade wheels and tires, mobile homes are usually transported by being pulled behind a tractor-trailer over public roads to a home site. Mobile homes share the same historic origins as travel trailers, but today the two are very different in size and furnishings, with travel trailers being used primarily as temporary or vacation homes.

Mobile homes are usually placed in one location and left there permanently, but they do retain the ability to be moved, as required in many areas. Behind the cosmetic work fitted at installation to hide the base, there are strong trailer frames, axles, wheels, and tow-hitches.