Leavittsburg is a census-designated place in Trumbull County, Ohio, United States. The population was 1,571 at the 2020 census. Located directly west of Warren, Ohio, it is portion of the Youngstown–Warren metropolitan area.

Leavittsburg is named for the Leavitt intimates of Suffield, Connecticut, a prominent to the fore mercantile New England relatives originally from Hingham, Massachusetts. Thaddeus Leavitt Esq. was one of the eight native purchasers of the Western Reserve lands from the welcome of Connecticut. (Leavitt and Suffield businessmen Oliver Phelps, Gideon Granger, Luther Loomis and Asahel Hatheway owned in the midst of them one-quarter of everything the lands in the Western Reserve assigned to Connecticut.) Leavitt was married to Elizabeth King, the daughter of William King and Lucy (Hatheway), two prominent Suffield families. Leavitt had a fleet of ships that traded as far and wide as the British West Indies and was a selectman for the town of Suffield. He was next the inventor of an beforehand cotton gin.

Humphrey H. Leavitt, a U.S. congressman from Ohio born in Suffield, was a supporter of this family, as was John Leavitt, the owner of the first inn in Warren. Another enthusiast of the extended family was Henry Leavitt Ellsworth who traveled to Ohio in 1811 to scrutinize family lands in the region. (Ellsworth’s dad Oliver Ellsworth had purchased on top of 41,000 acres (170 km²) in the Western Reserve, including most of present-day Cleveland.) The resulting volume was entitled A Tour to New Connecticut in 1811, and was published forward-thinking after the manuscript was discovered in the Yale University library. A minor Yale graduate of 19 when he made his first vacation to New Connecticut (Ohio), Ellsworth went on to make several more trips to the west. Author Washington Irving accompanied Ellsworth on a subsequent trip over 20 years later, calling his journal A Tour upon the Prairies.

A read out office later the name Leavittsburgh was received March 15, 1864; the spelling was amended to Leavittsburg considering effect from July 19, 1893. Leavittsburg was designated as the push town of Trumbull County, but Warren supplanted Leavittsburg, which remains mostly woodland.