A dollhouse or doll's house is a toy home made in miniature. Since the early 20th century dollhouses have primarily been the domain of children, but their collection and crafting is also a hobby for many adults. English-speakers in North America commonly use the term dollhouse, but in the United Kingdom and other English-speaking countries the term is doll's house (or, less commonly, dolls' house). They are often built to put dolls in.

The history of today's dollhouses can be traced back about four hundred years to the baby house display cases of Europe, which showed idealized interiors. Smaller dollhouses with more realistic exteriors appeared in Europe in the 18th century. Early dollhouses were all hand made, but following the Industrial Revolution and World War II, they were increasingly mass-produced and became more standardized and affordable. Dollhouses can range from simple boxes stacked together used as rooms for play, up to multi-million dollar structures displayed in museums.

Contemporary children's play dollhouses are mostly in 1:18 (or 2/3") scale, while 1:12 (or 1") scale is common for dollhouses made for adult collectors.