Deweyville is a census-designated place (CDP) in Newton County, on the central eastern border of Texas, United States.

This settlement was established in 1898 as a sawmill site by the Sabine Tram Company, which had a logging operation.

It was named after George Dewey, an admiral in the United States Navy who was victorious in the Battle of Manila Bay in the Spanish–American War in the Philippines that same year.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[14] As of the 2020 United States census, there were 571 people, 253 households, and 201 families residing in the CDP.

Over 5000 homes were flooded in Deweyville and the surrounding area, to include parts of Louisiana along the Sabine River, during the month of March 2016.

The flooding was caused by torrential rains and the release of water from the Toledo Bend Reservoir.