Harold John Finlay (22 March 1901 – 7 April 1951) was a New Zealand palaeontologist and conchologist.
He was born in Comilla, India (now Bangladesh), on 22 March 1901.
His main research interest was marine and non-marine malacofauna of New Zealand, both recent and fossil.
He also specialised on fossil Foraminifera.
He was elected a Fellow of the Royal Society of New Zealand in 1939, and was awarded the scoiety's Hector Memorial Medal in 1941.