Dyer is a city in Gibson County, Tennessee, United States.

[5] According to the United States Census Bureau, the city has a total area of 2.3 square miles (6.0 km2), all land.

The annual Dyer Station Celebration is held during the week of the Fourth of July each year.

The celebration was started with the hard work of Johnny McIlwain to honor the memory of his aunt, Mrs. Georgia Ellis, Dyer's first female alderman.

Prior to consolidation in 1980, Dyer High School served the community.

[9] Dyer was hit directly by an F3 tornado on April 2, 2006, which devastated the town and left 15 people dead.

Early estimates were that over 1,500 homes were destroyed in Dyer and other areas of Gibson County.