Jean-Baptiste Athanase Tassin (May 3, 1800 - January 25, 1868) was a publisher and lithographic printer active in early 19th century Calcutta, India. Tassin was born in Aix, France, where he trained as a naturalist. He joined a French government expedition to the East Indies as a naturalist. During this voyaged he became a master draughtsman. His ship wrecked in the Malayan archipelago in the late 1820s, leaving Tassin stranded in Singapore. He somehow worked his way to Calcutta, where, receiving a loan of 10,000 Rupees from Henry Thoby Prinsep, he founded publishing house, the Oriental Lithographic Press, specializing in government work. His skill as a draughtsman brought him business as map printer, leading to rich government contracts for such work, his skill often granting him precedence over official government-operated presses. The Oriental Lithographic Press continued to published until c. 1941, but Tassin left India around 1839, with a nest-egg of some 16,000 GBP. He was described with praise in the Calcutta Courier (June 27, 1832),

Mr. Tassin is a gentleman of much sterling worth. He is the most successful of all the lithographer of the East, but he owes much to the aid afforded to him by the experience of others. His zeal, and I may say enthusiasm, for lithography, as well as his industry and perseverance, make up for much of the other requisites.
Tassin remained in France throughout the 1840s employed as a cartographer with the French Army. The 1848 February Revolution drove him into exile to San Francisco - just in time for the Gold Rush. He published several maps of San Francisco and California in the mid-1850s and may have been an owner of the Adelphi Theater. The Adelphi burned in 1858, after which Tassin returned to Paris. Ernest de Massey, a fellow Frenchman in San Francisco, recorded meeting Tassin,
Another silhouette ... This one is of Sieur Tassin, Chevalier of the Legion d’Honneur, ex-engineer of geography of the French government, commissioned in the Orient. He seemed to do his work with honesty. He was in haste to leave his business which must have been repugnant to him. Very ingratiating, pleasant and polite, he would have been better suited to a drawing room than a gambling house. He made a fortune and went away. In 1860 I met him on the street of Paris. He was then a 'big' Monsieur Tassin. If I had met him in a drawing-room his face would have shown much more embarrassment, as I do not believe he advertised his ability at the green-covered table where the nuggets were easier to gather than they were in the mines.
Tassin died in France of unknown causes. For our research on Tassin we are somewhat indebted to Ashley Baynton-Williams.