Lyndon has been given to about 10,120 people in the United States since 1880. It was most common in 1964, which makes it a boomer-era name.
Its best year was 1964, when 520 babies were given the name, ranking 346th. The typical living American called Lyndon is about 39 years old today. It is relatively most common in Pennsylvania, where it accounts for 0.01% 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.