William Frederick Henry Rosenberg (1868–1957) was an English ornithologist and entomologist.
In 1896 he went to Ecuador and later returned to Colombia collecting especially for Walter Rothschild.
From 1898 until 1899 he employed collectors in South America who provided him with bird skins for Rothschild.
He started a business as a natural history dealer in Tring in 1897 and in 1898 he moved the dealership to 57 Haverstock Hill, London.
Rosenberg was a Fellow of the Royal Entomological Society of London.