Denny has been given to about 15,819 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 445 babies were given the name, ranking 325th. The typical living American called Denny is about 61 years old today. It is relatively most common in Washington, 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.