Barton on Sea (often hyphenated as Barton-on-Sea) is a coastal village situated in Hampshire, England. As a settlement, Barton has a history dating back to Anglo-Saxon times, although the modern village was largely built in the 20th century. It is effectively a suburb of New Milton. Barton is notable for the many fossils to be found in the Barton geological beds in the cliffs, as well as for the significant sea defences built to defend the cliffs against coastal erosion.