Over the past 110 years, 503 girls and 686 185 boys have been named Jack. The name Jack ranks 4888th in the United States among the most common names for girls. For the first time more than ten times newborns were named Jack in 1912. The peak of popularity of the name Jack came in the 1910s and 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.