John Gilbert Baker (13 January 1834 – 16 August 1920) was an English botanist.
Baker was born in Guisborough, the son of John and Mary (nêe Gilbert) Baker and educated at Quaker schools in Ackworth and York.
He worked at the library and herbarium of Royal Botanic Gardens, Kew between 1866 and 1899, and was keeper of the herbarium from 1890 to 1899. He wrote handbooks on many plant groups, including Amaryllidaceae, Bromeliaceae, Iridaceae, Liliaceae, and ferns. His published works include Flora of Mauritius and the Seychelles (1877) and Handbook of the Irideae (1892).
He was elected a Fellow of the Royal Society in 1878. [1]
He died in Kew in 1920. He had married Hannah Unthank in 1860 and was the father of botanist Edmund Gilbert Baker.