Over the past 110 years, 57 370 girls and 107 boys have been named Opal. The name Opal ranks 480th in the United States among the most common names for girls. For the first time more than ten times newborns were named Opal in 1910. The peak of popularity of the name Opal came in the 1910s and 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.