Sir Nathaniel Napier, 3rd Baronet (c. 1668 – 24 February 1728), of Moor Crichel, Dorset, was an English landowner and politician who sat in the English House of Commons from 1695 to 1708 and in the British House of Commons from 1710 to 1722.
Napier was the only surviving son of Sir Nathaniel Napier, 2nd Baronet, MP and his wife Blanche Wyndham, the daughter and coheiress of judge Sir Hugh Wyndham of Silton, Dorset.
He was admitted at Lincoln's Inn in 1683 and matriculated at Trinity College, Oxford 10 April 1685, aged 16.
[2] Napier was returned unopposed at the 1695 general election as Member of Parliament (MP) for Dorchester on the family interest.
He was returned unopposed at the second election in 1701 and was joined in Parliament by his father at a subsequent by-election.