Jean-Baptiste Alphonse Karr (November 24, 1808 - September 29, 1890), French critic and novelist, was born in Paris, and after being educated at the College Bourbon, became a teacher there.

In 1832 he published a novel, Sous les Tilleuls, characterized by an attractive originality and a delightful freshness of personal sentiment. A second novel, Une heure trap tard, followed next year, and was succeeded by many other popular works. His Vendredi soir (1835) and Le Chemin le plus court (1836) continued the vein of autobiographical romance with which he had made his first success. Genevieve (1838) is one of his best stories, and his Voyage autour de man jardin (1845) was deservedly popular. Others were Feu Bressier (1848), and Fort en theme (1853), which had some influence in stimulating educational reform.

In 1839 Alphonse Karr, who was essentially a brilliant journalist, became editor of Le Figaro, to which he had been a constant contributor; and he also started a monthly journal, Les Guepes, of a keenly satirical tone, a publication which brought him the reputation of a somewhat bitter wit. His epigrams were frequently quoted; e.g. "plus ça change, plus c'est la même chose," and, on the proposal to abolish capital punishment, "je veux bien que messieurs les assassins commencent."

In 1848 he founded Le Journal. In 1855 he went to live at Nice, where he indulged his predilections for floriculture, and gave his name to more than one new variety. Indeed he practically founded the trade in cut flowers on the Riviera. He was also devoted to fishing, and in Les Soirées de Sainte-Adresse (1853) and Au bord de la mer (1860) he made use of his experiences. His reminiscences, Livre de bord, were published in 1879-1880. He died at St Raphael (Var).