Cornett is an unincorporated community in Cass County, Texas, United States.

[1] According to the Handbook of Texas, the community had a population of 30 in 2000.

Cornett was settled sometime before the American Civil War as Hamil's Chapel, but was later renamed after a local family.

[2] Cornett is located at the intersection of Farm to Market Roads 2888, 250 and 2745, 12 mi (19 km) north of Hughes Springs and 8 mi (13 km) southeast of Naples in northwestern Cass County.

[3] Today, the community is served by the Hughes Springs Independent School District.