Theresia
Recorded 1881–2007 · United States
Theresia was most popular in 1959, when 58 American babies were given the name — ranking #2,315 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 2,016 people named Theresia.
Theresia over time
How old is the name Theresia?
Theresia first appears in Social Security Administration records in 1881, which makes it about 144 years old as a recorded American name. It has been recorded in 115 of the 145 years since. It was last recorded in 2007.
How many people are named Theresia?
The Social Security Administration has recorded 2,016 American births named Theresia between 1880 and 2025. That is recorded US births, not a world population — it counts people issued a Social Security number at birth in the United States. Of those, roughly 1,027 are estimated to be alive today.
How many babies were named Theresia in 2025?
Theresia was not recorded in 2025. The SSA withholds any name given to fewer than five babies in a year, so fewer than five American babies were given it.
Is Theresia a boy’s or a girl’s name?
Across the whole record Theresia is a girl’s name — 100.0% of the 2,016 Americans given it were girls and 0.0% were boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
How old is someone named Theresia?
Roughly 1,027 Americans named Theresia are alive today — 51% of everyone ever recorded with the name. The median is 65 years old, and half are between 56 and 72.
An estimate, not a count. Recorded births are carried forward through the Social Security Administration’s 2023 period life table, by age and sex. That table describes mortality in one recent year, so it credits the oldest cohorts with today’s survival rather than the harsher rates they actually lived through — the further back a name peaked, the more this will overstate how many remain. It counts people issued a Social Security number at birth, not immigrants who arrived later.
Explore further
See Theresia on the interactive charts
About · Privacy · Contact
Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org