David William St John Heath is a British optometrist and Liberal Democrat politician. He was the Member of Parliament (MP) for Somerton and Frome from 1997 to 2015. He served as the Minister of State for Agriculture and Food from September 2012 to October 2013 in the Cameron–Clegg coalition government.

St John's College is a constituent college of the University of Oxford. Founded as a men's college in 1555, it has been coeducational since 1979. Its founder, Sir Thomas White, intended to provide a source of educated Roman Catholic clerics to support the Counter-Reformation under Queen Mary.