Sir John Vanden-Bempde-Johnstone, 2nd Baronet (28 August 1799 – 24 February 1869) was a British Member of Parliament. Vanden-Bempde-Johnstone was the son of Sir Richard Vanden-Bempde-Johnstone, 1st Baronet. He succeeded as second Baronet in 1807, at the age of seven, on the death of his father. In 1830 he was elected to the House of Commons for Yorkshire as a Whig, a seat he held until the constituency was abolished in 1832. The latter year he was returned for Scarborough. During the 1835 parliament he defected from the Whigs to the Conservatives, and lost his seat in 1837, but regained it in 1841, and continued to represent the constituency until his death 28 years later. However, from 1857 he sat as a Liberal.