Over the past 110 years, 16 222 girls and 3 510 boys have been named Lacy. The name Lacy ranks 1004th in the United States among the most common names for girls. For the first time more than ten times newborns were named Lacy in 1910. The peak of popularity of the name Lacy 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.