Over the past 110 years, 311 960 girls and 6 135 boys have been named Erin. The name Erin ranks 114th in the United States among the most common names for girls. For the first time more than ten times newborns were named Erin in 1913. The peak of popularity of the name Erin came in the 1970s and 1980s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.