Over the past 110 years, 20 867 girls and 231 boys have been named Hilary. The name Hilary ranks 874th in the United States among the most common names for girls. For the first time more than ten times newborns were named Hilary in 1941. The peak of popularity of the name Hilary 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.