Recorded 1940–2005 · United States
Tonja was most popular in 1967, when 512 American babies were given the name — ranking #728 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 6,994 people named Tonja.
Tonja first appears in Social Security Administration records in 1940, which makes it about 85 years old as a recorded American name. It has been recorded in 62 of the 86 years since. It was last recorded in 2005.
The Social Security Administration has recorded 6,994 American births named Tonja 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 6,390 are estimated to be alive today.
Tonja 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.
Across the whole record Tonja is a girl’s name — 99.9% of the 6,994 Americans given it were girls and 0.1% 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.
Roughly 6,390 Americans named Tonja are alive today — 91% of everyone ever recorded with the name. The median is 57 years old, and half are between 53 and 61. That is a narrow band: Tonja arrived and faded within about a decade rather than staying in steady use.
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.
How much more common the name is in each state than across the country as a whole.
See Tonja on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org