Thomas O'Hanlon (c. 1837[1] – 7 May 1897) was an Irish Nationalist politician who served as Member of Parliament (MP) for East Cavan from 1885 to 1892.
He was a native of Newry and became a wholesale and retail grocer in Derry.
When the Irish Parliamentary Party split in December 1890 over the leadership of Charles Stewart Parnell, O'Hanlon supported Parnell.
He later stood as a candidate for Dublin Corporation in the Rotunda ward on 24 December 1895, but failed by 85 votes to win the seat.
[2] He died of acute pneumonia at his home in North Frederick Street, Dublin, on 7 May 1897, having been attended in the earlier stages of his illness by his former Parnellite Parliamentary colleague Dr J. E. Kenny.