The story of Kourtney
Kourtney is rare for girls in the United States, ranked #4,502 in 2025 with 31 babies given the name. It is currently declining compared with a decade ago.
Since 1964, 14,765 American babies have been named Kourtney, about 94% girls and 6% boys, making it a genuinely unisex name. Its peak came in 1990, when 682 newborns received the name, the signature sound of the 1990s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Kourtney stood among all girls' names in any year, or use the compare tool to plot it against other names.