Yaak

Yaak may refer to:

People:
 * Yaak Karsunke (born 1934), German author and actor
 * Yaak Uudmae (born 1954), retired Estonian triple jumper and long jumper, 1980 Olympic gold medallist

Locations:
 * Yaak, Montana, unincorporated town in Lincoln County, Montana, United States
 * Yaak River, tributary of the Kootenay River in Montana, USA and British Columbia, Canada
 * Yaak Air Force Station, closed United States Air Force General Surveillance Radar station