Elmer is a city in Macon County, Missouri, United States.

Elmer had its start in 1888 when the Atchison, Topeka and Santa Fe Railway was extended to that point.

[8] Elmer is in northern Macon County, 9 miles (14 km) southwest of La Plata and 23 miles (37 km) northwest of Macon, the county seat.

There were 47 housing units at an average density of 188.0 per square mile (72.6/km2).

30.6% of all households were made up of individuals, and 13.9% had someone living alone who was 65 years of age or older.

37.0% of all households were made up of individuals, and 13.0% had someone living alone who was 65 years of age or older.

There were 11.8% of families and 29.5% of the population living below the poverty line, including 40.0% of under eighteens and 13.3% of those over 64.