John Henry Heuland (March 21, 1778 Bayreuth – November 16, 1856 Hastings) was a German born (Johann Heinrich) English mineralogist and dealer.
His collection is held by the Natural History Museum, London.
He subsequently travelled through France, Germany, Sweden, and Russia, collecting and buying minerals.
About the year 1806 he acquired minerals collected in Europe between the years 1766 and 1806 by his uncle Adolarius Jacob Forster whose London dealership later became Heuland's.
He played a dubious role in the discovery of Palladium.