Gassville is a city in Baxter County, Arkansas, United States. According to the 2020 census, the city population was 2,171. Gassville is located …Gassville is a city in Baxter County, Arkansas, United States. According to the 2020 census, the city population was 2,171. Gassville is located at 36°16′59″N 92°29′24″W / 36.28306°N 92.49000°W. According to the United States Census Bureau, the city has a total area of 3.6 square miles, all land.