Over the past 110 years, 6 girls and 29 011 boys have been named Dexter. The name Dexter ranks 17624th in the United States among the most common names for girls. For the first time more than ten times newborns were named Dexter in 1924. The peak of popularity of the name Dexter came in the 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.