Monticello is an unincorporated community in Titus County, Texas, United States.

Monitcello is situated on Farm to Market Road 127. It is named for Lake Monticello, which is located southward. The town was settled in the 1850s, and a post office opened in 1857, with Cicero J. Corder serving as the first postmaster. By 1890, it had a population of 40, and had a brick factory, a school, two gins, two stores and two mills, one a steam mill operated by Theodore Stewig, which was the largest business. All but one store remained by 1896. The population remained consistent until 1974, when it was incorporated with a population of 174. As of 2000, the population was 20.