Michel-Guillaume-Saint-Jean de Crèvecoeur (born January 31, 1735, Caen, France—died November 12, 1813, Sarcelles) was a French American author whose work provided a broad picture of life in the New World.

After study in Jesuit schools and four years as an officer and mapmaker in Canada, Crèvecoeur chose in 1759 to remain in the New World. He wandered the Ohio and Great Lakes region, took out citizenship papers in New York in 1765, became a farmer in Orange county, and in 1769 married Mehitable Tippet, with whom he had three children.

When the American Revolution broke out, Crèvecoeur found himself in an untenable position: his wife was from a loyalist family and he had friends and neighbours among the opposite faction. Persecuted by both sides, he left rebel country only to languish for months in a British army prison in New York City before sailing for Europe in 1780, accompanied by one son. In London, using his American name, J. Hector St. John, he arranged for the publication in 1782 of 12 essays called Letters from an American Farmer.

Within two years this book—charmingly written, optimistic, and timely—saw eight editions in five countries and made its author famous, gaining him such influential patrons as the naturalist the comte de Buffon and Benjamin Franklin, a membership in France’s Academy of Sciences, and an appointment as French consul to three of the new states in America. Before assuming his consular duties in 1784, Crèvecoeur translated and added to the original 12 essays, in Lettres d’un cultivateur Américain, 2 vol. (Paris, 1784).

In America again, Crèvecoeur found his home burned, his wife dead, and his daughter and second son with strangers in Boston. Reunited with his children, he set about organizing a packet service between the United States and France, continued an interest in botany, and published articles on agriculture and medicine. A two-year furlough in Europe resulted in a larger, second edition of the French Lettres, 3 vol. (1790). Recalled from his consulship in 1790, Crèvecoeur wrote one other book on America, Voyage dans la haute Pennsylvanie et dans l’État de New York, 3 vol. (1801; Travels in Upper Pennsylvania and New York, 1961). He lived quietly in France and Germany until his death.

Because of his letters, Crèvecoeur was not only for a while the most widely read commentator on America but also a great favourite with such Romantics as Charles Lamb and Thomas Campbell and with the revolutionist Jacques-Pierre Brissot. His reputation was further increased in the 1920s when a bundle of his unpublished English essays was discovered in an attic in France. These were brought out as Sketches of Eighteenth Century America, or More Letters from an American Farmer (1925). Crèvecoeur’s books outline the steps through which new immigrants passed, analyze the religious problems of the New World, describe the life of the whalers of Nantucket, reveal much about the Indians and the horrors of the Revolution, and present the colonial farmer—his psychology and his daily existence—more completely than any contemporaneous writings were able to do. The passage containing his “melting pot” theory and answering the question “What is an American?” is widely quoted, and historians of the frontier depend heavily on his documented account of the stages by which the log cabin became the opulent farmhouse. His charming style, keen eye, and simple philosophy are universally admired.