Over the past 110 years, 77 686 boys and 470 277 girls have been named Kelly. The name Kelly ranks 331th in the United States among the most common names for boys. For the first time more than ten times newborns were named Kelly in 1910. The peak of popularity of the name Kelly came in the 1960s and 1970s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.