Vaisala can refer to:
Last name
Vilho Väisälä (1899–1969), Finnish meteorologist and businessman Yrjö Väisälä (1891–1971), Finnish astronomer and physicist
Other
139P/Väisälä–Oterma, a periodic comet discovered by Yrjö Väisälä and Liisi Oterma 1573 Väisälä, a minor planet named for Yrjö Väisälä Brunt–Väisälä frequency, the angular frequency at which a vertically displaced parcel will oscillate within a statically stable environment Schmidt-Väisälä camera, a type of telescope Vaisala (crater), a lunar crater named for Yrjö Väisälä Vaisala, Samoa, a village in Samoa Vaisala, a Finnish company founded by Vilho Väisälä