Over the past 110 years, 25 782 girls and 105 boys have been named Hillary. The name Hillary ranks 781th in the United States among the most common names for girls. For the first time more than ten times newborns were named Hillary in 1945. The peak of popularity of the name Hillary came in the 1980s and 1990s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.