Donald Foster may refer to:

• Donald Foster (actor) (1889–1969), American film and television actor
• Don Foster, Baron Foster of Bath (born 1947), British Liberal Democrat politician
• Donald Wayne Foster (born 1950), American Shakespeare scholar
• Don Foster (screenwriter), known for the American television sitcom Dharma & Greg (1997{{ndash}}2002)

• Thin noodle
• Thinocori
• Thinocorus orbignyianus
• Thinocorus rumicivorus
• Thinornis
• Thinornis novaeseelandiae
• Thinornis rubricollis
• Thin plate spline
• Thin Provisioning
• Thin provisioning
• Thin Red Line (album)
• Thin Red Line (Album)
• Thinrukerehaa
• Thin sand rat
• Thinsations
• Thin section
• Thinset
• Thin set (Serre)
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• Thin Shrew
• Thin-Shrink Small Outline Package
• Thin Shrink Small Outline Package
• Thin-shrink small-outline package
• Thin skull doctrine
• Thin space character