Over the past 110 years, 181 101 girls and 20 boys have been named Eileen. The name Eileen ranks 201th in the United States among the most common names for girls. For the first time more than ten times newborns were named Eileen in 1910. The peak of popularity of the name Eileen came in the 1920s and 1940s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.