Cillian vs Noah
How Cillian and Noah 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 Cillian (boys) vs Noah (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 | Cillian | Noah |
|---|---|---|
| Peak year (most US births) | 2024 — 668 boys | 2025 — 20,358 boys |
| Peak rank | #463 | #2 |
| Most recent rank (2025) | #507 (595 births) | #2 (20,358 births) |
| Total US births since 1880 | 2,659 | 491,353 |
| Last 10 years (2016–2025) | 2,659 | 191,165 |
Peak comparison takeaway
At its all-time peak, Noah reached 20,358 US births in 2025 — 19,690 more than Cillian's peak count.
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 boys-name list.
Cillian — top 5 states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | New Hampshire | #239 | 15 |
| 2 | Massachusetts | #354 | 141 |
| 3 | Connecticut | #413 | 40 |
| 4 | Oregon | #476 | 30 |
| 5 | Minnesota | #509 | 31 |
Noah — top 5 states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | Illinois | #1 | 6,477 |
| 2 | California | #1 | 23,503 |
| 3 | Connecticut | #1 | 2,147 |
| 4 | Pennsylvania | #1 | 6,292 |
| 5 | Michigan | #1 | 4,404 |
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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 →