Osa
#10,709 in 2025UnisexGirls' nameBoys' nameMeaning not yet documented
Osa has been given to 770 babies in the U.S. since 1880. In 2025 it ranked #10,709 of 17,293 girls’ names in use. Its peak year was 1892, with 21 recorded. It's used for both sexes: 89% girls, 11% boys all-time.
Babies named Osa, 2025
1 in 368,000
Osa over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
Girls or boys — Osa over time
In 2025, Osa went to 100% girls and 0% boys.
A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.
How common is Osa?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 368,000
- 9 of 3,315,165 births
- Among girls only
- 1 in 179,000
- <0.01% of girls
- Rank, 2025
- #10,709
- of 17,293 girls’ names in use
- Coin-flip room size
- 255,323 kids
- Even odds of a second one
Where Osa sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 255,323 children born in 2025 and it's an even bet that one of them is another Osa. In a class of 30 the chance is Under 1%.
When Osas were born
Half of everyone ever recorded as Osa was born before 1913 — so the typical Osa is around 112 today.
- Biggest decade
- 1890s
- 20.4% of all use
- Born in the last 25 years
- 6.1%
- Mostly a past generation
- Recorded since 1950
- 55
- People you could plausibly meet
1890s — 20.4% of all recorded uses (139).
Is Osa rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- +4,137
- Places climbed
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 42.9%
- Peak was 1892 (21)
- Years since peak
- 133
- Years
- Year-to-year steadiness
- Volatile
- 49.2% average annual change
Where Osa is used — girls
Across 1910–2025, Osa was most concentrated in Tennessee — about 1 in — girls, against 1 in 572,848 across all states with data.
Most concentrated
- 1Tennessee1 in —
Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Osa has too little recent state data to map, so this covers all years from 1910.
Where Osa is used — boys
Across 1910–2025, Osa was most concentrated in Kentucky — about 1 in — boys, against 1 in 597,456 across all states with data.
Most concentrated
- 1Kentucky1 in —
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Osa has too little recent state data to map, so this covers all years from 1910.
Osa by the numbers
The raw record for each sex the name is used for.
As a girl's name
Names similar to Osa
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Osa
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.