Sir Laurence Parsons, 3rd Baronet (1708 – 24 October 1756) was an Anglo-Irish politician.
His father predeceased his grandfather, and Parsons succeeded to his grandfather's baronetcy on 17 March 1741.
Between 1741 and his death, Parsons sat in the Irish House of Commons as the Member of Parliament for King's County.
He married, secondly, Anne Harman, daughter of Wentworth Harman and Frances Sheppard, on 16 February 1742.
His son from his first marriage, William Parsons succeeded to his title in 1756, while a son from his second marriage, Laurence Parsons, was elevated to the peerage as Earl of Rosse in 1806.