Osbert is a male Germanic given name and a surname, composed of the elements ans/os "god", and berht "bright".

Given name

Pre-modern era

• Osbert or Osberht of Northumbria (died 867), King of Northumbria

• Osbert or Osbeorn Bulax (died c. 1054), son of Siward, Earl of Northumbria

• Osbert de Bayeux (fl. 1121−1184), medieval English cleric and archdeacon

• Osbert of Clare (died in or after 1158), monk, elected prior of Westminster Abbey and briefly abbot, writer, hagiographer and forger of charters

• Osbert of Dunblane (died 1230), Bishop of Dunblane

• Osbert de Longchamp (c. 1155−before 1208), Anglo-Norman administrator

• Osbert fitzHervey (died 1206), Anglo-Norman royal judge

Modern world

• O. G. S. Crawford (1886−1957), English archaeologist and a pioneer in the use of aerial photographs in his field

• Osbert Lancaster (1908−1986), English cartoonist, author, art critic and stage designer

• Osbert Mackie (1869−1927), English rugby union centre and Anglican priest

• Osbert Molyneux, 6th Earl of Sefton (1871−1930), British courtier and Liberal politician

• Osbert Mordaunt (cricketer, born 1876) (1876−1949), English cricketer

• Osbert Peake, 1st Viscount Ingleby (1897−1966), British Conservative Party politician

• Osbert Salvin (1835−1898), English naturalist, ornithologist and herpetologist

• Osbert Sitwell (1892−1969), English writer

Surname

• Alphonse Osbert (1857-1939), French painter

• William Fitz Osbert (died 1196), champion of the poor in London