James Douglas Ogilby (16 February 1853 – 11 August 1925) was an Australian ichthyologist and herpetologist.
Ogilby was born in Belfast, Ireland, and was the son of zoologist William Ogilby. He received his education at Winchester College, England, and Trinity College, Dublin.
Ogilby worked for the British Museum before joining the Australian Museum in Sydney. After being let go for drunkenness, he picked up contract work before joining the Queensland Museum in Brisbane.
He was the author of numerous scientific papers on reptiles, and he described a new species of turtle and several new species of lizards.
Ogilby died on 11 August 1925 and was buried at Toowong Cemetery.