Portrait of James, Duke of York is a 1673 portrait painting by the French artist Henri Gascar depicting the future James II of England, then Duke of York.

He stands in a pavilion with his flagship the Royal Prince in the background.

The pageboy on the right was traditionally described as John Churchill, the future Duke of Marlborough, although by the time the painting was produced Churchill was an adult and serving on the continent.

[4] James was Lord High Admiral during the reign of his brother Charles and had commanded the Royal Navy at the Battle of Lowestoft in 1665 and Battle of Solebay in 1672 during the Anglo-Dutch Wars.

Today the painting is in the collection of the National Maritime Museum in Greenwich having been presented to Greenwich Hospital by William IV in 1835.