Erma has been given to about 55,187 people in the United States since 1880. It was most common in 1920, which makes it a interwar name.
Its best year was 1920, when 1,541 babies were given the name, ranking 152nd. The typical living American called Erma is about 82 years old today. It is relatively most common in Indiana, where it accounts for 0.01% of births.
Source: US Social Security Administration, national and state name files, 2025 release. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.