Masury is a census-designated place (CDP) in Trumbull County, Ohio, United States. The population was 2,618 at the 2000 census. It is part of the Youngstown–Warren–Boardman, OH-PA Metropolitan Statistical Area.
The community has the name of Colonel Fred L. M. Masury, a first settler.
At 7:10 p.m. on May 31, 1985, Masury was struck by an F-5 tornado as it passed through Hubbard into Wheatland, Pennsylvania. One person died in Masury as a result of the tornado. The base of the tornado spread over half a mile and wind speed was estimated at over 300 mph. The storm moved through Masury quickly and went on to destroy nearly 95% of Wheatland's industrial area.
Masury is located at 41°12′28″N 80°32′12″W (41.207736, -80.536628).
According to the United States Census Bureau, the CDP has a total area of 3.7 square miles (9.6 km2), of which 3.6 square miles (9.3 km2) is land and 0.04 square miles (0.10 km2) (0.82%) is water.
As of the census of 2000, there were 2,618 people, 1,044 households, and 722 families residing in the CDP. The population density was 723.8 people per square mile (279.2/km2). There were 1,096 housing units at an average density of 303.0/sq mi (116.9/km2).