Sidney Herbert, 14th Earl of Pembroke, 11th Earl of Montgomery (20 February 1853, Belgrave Square — 30 March 1913, Rome) was a British politician and peer.

Educated at Eton and Christchurch, Herbert followed his father, Sidney Herbert, 1st Baron Herbert of Lea, into politics. He was elected as Member of Parliament for Wilton in Wiltshire in 1877 but lost his seat in the 1885 general election. This was somewhat of a shock given that the seat of the Earls of Pembroke was at Wilton House and his family dominated Wiltshire politics.

At this time a Liberal Unionist, Herbert was then chosen to replace William Grantham , who had just been appointed a judge, for the 1886 general election in Croydon. He was elected MP for Croydon and served until his elevation in 1895. He was a Conservative Whip and a Lord of the Treasury. Although considered an able Member of Parliament, he was perhaps best-known for his good looks and was widely regarded as the most handsome MP at the time.

Herbert succeeded his brother, George Herbert, 13th Earl , as Earl of Pembroke in 1895. He continued his political career in the House of Lords as Lord Steward of the Household 1895-1905.

Herbert was married on 29 August 1877 to Beatrix Louisa Lambton. Their son, Reginald , succeeded as Earl of Pembroke.