Over the past 110 years, 12 750 girls and 844 boys have been named Regan. The name Regan ranks 1138th in the United States among the most common names for girls. For the first time more than ten times newborns were named Regan in 1949. The peak of popularity of the name Regan came in the 1990s and 2000s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.