Knaggs is an English surname, whose bearers include:
Charlie Knaggs, Colonel in the Irish GuardsHenry Valentine Knaggs (1859–1954), physician and authorJames Knaggs, territorial commander, Western USA Salvation ArmySir Samuel William Knaggs (1856–1924), civil servant (West Indies)Skelton Knaggs (1911–1955), stage actor and horror movie actorThomas Knaggs (1661–1724), preacher and publisher of sermonsWhitmore Knaggs (1763–1827), Indian fighter, linguist and spy