Osier

Osier may refer to:


 * Willow or osiers, a genus of deciduous trees and shrubs
 * Common osier (Salix viminalis), a species of willow
 * Red osier (Cornus sericea), a species of flowering plant
 * Osier, Colorado, an unincorporated community along the Rio de Los Pinos river in Colorado
 * Osier, Michigan, a ghost town
 * Faith Osier, African immunologist
 * Ivan Osier (1888–1965), Danish Olympic medalist