Over the past 110 years, 18 470 girls have been named Kiera. The name Kiera ranks 934th in the United States among the most common names for girls. For the first time more than ten times newborns were named Kiera in 1969. The peak of popularity of the name Kiera came in the 1990s and 2000s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.