Lonnie has been given to about 101,481 people in the United States since 1880. It was most common in 1947, which makes it a midcentury name.
Its best year was 1947, when 2,237 babies were given the name, ranking 137th. The typical living American called Lonnie is about 66 years old today. It is relatively most common in Arkansas, where it accounts for 0.02% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.