Sir John Sydenham, 2nd Baronet

Sir John Sydenham, 2nd Baronet (1643–1696) was an English politician who sat in the House of Commons at various times between 1665 and 1679.

Sydenham was the posthumous son of Sir John Sydenham, 1st Baronet of Brimpton, Somerset and his wife Anne Hare, daughter of Sir John Hare of Stow Bardolph, Norfolk, and his wife Elizabeth Coventry, daughter of Thomas Coventry, 1st Baron Coventry of Aylesborough.

In November 1665, he was elected Member of Parliament for Somerset in the Cavalier Parliament but his election was declared void.

He was elected MP for Somerset again in 1669 and was re-elected in 1679 for the First Exclusion Parliament.

[1] Sydenham married firstly, Elizabeth Poulett, daughter of John Poulett, 2nd Baron Poulett of Hinton St George and his first wife, Catherine de Vere, daughter of Horace Vere, 1st Baron Vere of Tilbury.