Sir Robert Lloyd Patterson (1836–1906) was an Irish naturalist and linen merchant.
In August 1902, he was awarded a knighthood for services to the Belfast Chamber of Commerce.
[1] Robert Lloyd Patterson wrote several zoological papers in the Irish Naturalist and the Report and Proceedings of the Belfast Natural History and Philosophical Society and a book titled The Birds, Fishes and Cetacea of Belfast Lough (1880).
On his death Robert Lloyd Patterson bequeathed his art collection to the Belfast Corporation.
It is now in the Ulster Museum.