Theresa has been given to about 405,831 people in the United States since 1880. It was most common in 1961, which makes it a boomer-era name.
Its best year was 1961, when 11,991 babies were given the name, ranking 35th. The typical living American called Theresa is about 64 years old today. It is relatively most common in Minnesota, where it accounts for 0.01% 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.