Buis

Buis is a Dutch surname that may refer to
 * Dale R. Buis (1921–1959), U.S. Army Major killed in Vietnam
 * Dyan Buis (born 1990), South African Paralympic sprinter and long jumper
 * Greg Buis, American reality show contestant
 * Jan Buis (born 1933), Dutch cyclist
 * Leen Buis (1906–1986), Dutch cyclist
 * Lela E. Buis, American speculative fiction writer, playwright, poet and artist
 * Marjolein Buis (born 1988), Dutch wheelchair tennis player
 * Tom Buis, former president of the American National Farmers Union

BUIS may also refer to
 * Backup iron sights, a type of firearm sights