Walter Foster may refer to:
- Walter Foster (cricketer) (born 1915, date of death unknown), Barbadian cricketer
- Walter Foster (mathematician), English mathematician
- Walter Edward Foster (1873–1947), Canadian politician and businessman in New Brunswick
- Walter T. Foster (1891–1981), American artist and publisher of art instruction books
- Walter Foster, 1st Baron Ilkeston (1840–1913), British physician and politician
- Walter W. V. Foster (1908–1944), Canadian politician
See also
- Walter Forster (disambiguation)