Over the past 110 years, 61 boys and 11 401 girls have been named Kourtney. The name Kourtney ranks 6655th in the United States among the most common names for boys. For the first time more than ten times newborns were named Kourtney in 1984. The peak of popularity of the name Kourtney 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.