Adamsville is a village in Muskingum County, Ohio, United States. The population was 114 at the 2010 census.
Adamsville was laid out in 1832, and named after John Quincy Adams or according to another source, Mordecai Adams, the proprietor of the village. A post office called Adamsville has been in operation since 1837. The village was incorporated in 1864.
According to the United States Census Bureau, the village has a total area of 0.05 square miles (0.13 km2), all land.
As of the census of 2010, there were 114 people, 45 households, and 33 families living in the village. The population density was 2,280.0 inhabitants per square mile (880.3/km2). There were 54 housing units at an average density of 1,080.0 per square mile (417.0/km2). The racial makeup of the village was 99.1% White and 0.9% from two or more races.
There were 45 households, of which 37.8% had children under the age of 18 living with them, 55.6% were married couples living together, 6.7% had a female householder with no husband present, 11.1% had a male householder with no wife present, and 26.7% were non-families. 22.2% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.