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is a village in Washington County, Ohio, United States, along the Ohio River. It is also commonly known as
. The population was 957 at the 2000 census.
Matamoras was founded in 1846, named for the Battle of Matamoras in the Mexican-American War. In 1861 the U. S. Post Office in Matamoras changed its name to New Matamoras to avoid confusion with Metamora in Fulton County.
According to the United States Census Bureau, the village has a total area of 0.4 square miles (1.0 km²), of which, 0.4 square miles (0.9 km²) of it is land and 0.04 square miles (0.1 km²) of it (7.69%) is water.