Mice are mammals of the Glires clade, which means they are amongst the closest relatives of humans other than lagomorphs, treeshrews, flying lemurs and other primates.

The three widely accepted subspecies are increasingly treated as distinct species by some:
southeastern Asian house mouse (Mus musculus castaneus) (southern and southeastern Asia)
Western European house mouse (Mus musculus domesticus); includes the fancy mouse and the laboratory mouse (Western Europe, North America, South America, Africa and Oceania)
Eastern European house mouse (Mus musculus musculus) (Eastern Europe and northern Asia)
Two additional subspecies have been recognized more recently:
southwestern Asian house mouse (Mus musculus bactrianus) (southwestern and Central Asia)
pygmy house mouse (Mus musculus gentilulus) (the Arabian Peninsula and Madagascar)
Many more subspecies' names have been given to house mice, but these are now regarded as synonyms of the five subspecies.
Some populations are hybrids of different subspecies, including the Japanese house mouse (M. m. molossinus).
Mice are mammals of the Glires clade, which means they are amongst the closest relatives of humans other than lagomorphs, treeshrews, flying lemurs and other primates.
The three widely accepted subspecies are increasingly treated as distinct species by some:
southeastern Asian house mouse (Mus musculus castaneus) (southern and southeastern Asia)
Western European house mouse (Mus musculus domesticus); includes the fancy mouse and the laboratory mouse (Western Europe, North America, South America, Africa and Oceania)
Eastern European house mouse (Mus musculus musculus) (Eastern Europe and northern Asia)
Two additional subspecies have been recognized more recently:
southwestern Asian house mouse (Mus musculus bactrianus) (southwestern and Central Asia)
pygmy house mouse (Mus musculus gentilulus) (the Arabian Peninsula and Madagascar)
Many more subspecies' names have been given to house mice, but these are now regarded as synonyms of the five subspecies. Some populations are hybrids of different subspecies, including the Japanese house mouse (M. m. molossinus).
House mouse