Brigadier Sir John Galway Foster (4 November 1904 – 1 February 1982) was a British Conservative Party politician. He served as Member of Parliament for the Northwich constituency in Cheshire from 1945 to February 1974.

John Foster (1762-1822) of Chapletown South Yorkshire was the composer of the tune set to While Shepherds Watched Their Flocks by Night known as Old Foster, one of the more popular of the hundreds of tunes used with these words. Musically he was based in one of the many non-conformist chapels in the Blackburn Valley, (see Blackburn Brook), near Sheffield. His style is 19th century classical.