Over the past 110 years, 17 842 girls have been named Kassidy. The name Kassidy ranks 948th in the United States among the most common names for girls. For the first time more than ten times newborns were named Kassidy in 1983. The peak of popularity of the name Kassidy came in the 2000s and 2010s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.