Elmer is a town in Jackson County, Oklahoma, United States.

According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.0 km2), all land.

There were 58 housing units at an average density of 145 per square mile (56/km2).

29.3% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older.

There were 10.3% of families and 9.3% of the population living below the poverty line, including no under eighteens and 17.6% of those over 64.