Siena has been given to about 11,070 people in the United States since 1880. It was most common in 2018, which makes it a current name.
Siena ranks 610th among American girls in 2025, with 479 born that year. Its best year was 2018, when 496 babies were given the name, ranking 611th. The typical living American called Siena is about 13 years old today. It is relatively most common in District of Columbia, where it accounts for 0.11% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.