Kelsey vs Mason
How Kelsey and Mason compare across 146 years of US Social Security Administration baby-name records — popularity history, peak years, current rank, and which name overtook which.
US Popularity History — Side-by-Side
Annual US births named Kelsey (girls) vs Mason (boys), from US Social Security Administration national records.
Source: US Social Security Administration. Names appearing fewer than 5 times per year are suppressed by SSA.
Quick Stats
| Metric | Kelsey | Mason |
|---|---|---|
| Peak year (most US births) | 1992 — 11,713 girls | 2011 — 19,528 boys |
| Peak rank | #23 | #2 |
| Most recent rank (2025) | #814 (335 births) | #39 (6,291 births) |
| Total US births since 1880 | 140,415 | 310,019 |
| Last 10 years (2016–2025) | 5,773 | 100,150 |
Peak comparison takeaway
At its all-time peak, Mason reached 19,528 US births in 2011 — 7,815 more than Kelsey's peak count.
Crossover Years
Years where one name first passed the other in annual US births. A name "winning" in a year means it had more births that year, not necessarily a higher rank.
| Year | New leader | Kelsey births | Mason births |
|---|---|---|---|
| 1999 | Mason | 4,400 | 5,451 |
Strongest States — Last 10 Years
States where each name ranked highest, from SSA's state-level dataset. Lower average rank = name appears closer to the top of that state's girls-name list.
Kelsey — top 5 states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | Mississippi | #340 | 67 |
| 2 | New York | #382 | 456 |
| 3 | Alabama | #417 | 110 |
| 4 | New Jersey | #421 | 195 |
| 5 | Connecticut | #428 | 63 |
Mason — top 5 states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | Mississippi | #8 | 1,093 |
| 2 | West Virginia | #9 | 732 |
| 3 | Pennsylvania | #11 | 4,279 |
| 4 | North Carolina | #11 | 3,574 |
| 5 | Hawaii | #12 | 359 |
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Data & methodology
Source: US Social Security Administration national baby names dataset 1880–2025 (CC0 public domain). Names with fewer than 5 occurrences in a given year are suppressed by SSA. State-level coverage runs 1910–2025. Crossover detection compares annual birth counts (not ranks) for each year both names appear. Methodology: see full notes. More comparisons →