Total births
229
Boys' name · since 1993
Kj
Kj has 229 recorded births since 1993 in federal Social Security data, most heavily in 2021 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #5551
- among boys today
- 229
- born since 1993
- 2010s
- peak decade
- 61%
- more common than other boys
Yes -- Kj is the #5551 most popular boys' name in the U.S. today, with 229 recorded since 1993.
Kj has 229 recorded births among boys since 1993, per the U.S. Social Security Administration, ranked #5551 as of the latest data, more common than 61% of boys, busiest in the 2010s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1993 to 2025.
- #5551 among boys today
- 229 born since 1993
- 2010s peak decade
- 61% more common than other boys
Data updated Jun 2026
The verdict
Kj is currently the #5551 boys' name in America, more common than 61% of boys - 229 born since 1993, peaking in the 2010s.
- #5551
- among boys today
- 229
- born since 1993
- 2010s
- peak decade
- 61%
- more common than other boys
Kj vs. every other boys name in current SSA rankings
#5551
of 14,294 boys in use
More common than 61% of names given to boys today.
2010s
Peak decade
43% of everyone ever named Kj was born in this single decade.
2021
Single peak year
21 babies were named Kj in 2021 - its busiest year on record.
How Kj compares
229 41th percentile among 14,294 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Kj's all-time total is 38% below the median boys name, and Liam still leads by a wide margin.
| Metric | Kj | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 229 | 367 | 358,536 |
| Peak-year births | 21 | 23 | 22,252 |
Kj's usage pattern, beyond the headline number
Kj splits its recorded history at 2015: 65% of all births land in the more recent half, 35% in the earlier half, a lean toward present-day use rather than a passing spike. The single quietest year was 2003 (5 births) -- compare that against the 2021 peak of 21 for a sense of just how much the name's popularity has swung.
Kj at a glance
Outside the top 1,000Peak year
2021
Current rank
#5,551
Active since
1993
Kj popularity over time
Annual U.S. births registered with the Social Security Administration · 1993–2025
- Peak year (2021)
- 21
- Annual births at peak, across 33 years of records
Kj by decade
Total births in each ten-year window, peak vs trough at a glance
2010s was Kj's strongest decade.
98 babies received the name during that ten-year window, about 43% of all-time use.
Kj births by decade
Total births in each ten-year window
- 1990s 6
1990s
6 births
- 2000s
2000s
40 births
- 2010s
2010s
98 births
- 2020s
2020s
85 births
What this shows Peak: 2010s at 98 births (43% of all-time use).
Frequently Asked Questions
How popular is the name Kj? ▼
Since 1993, Social Security records show 229 babies named Kj. Today it holds rank #5551 among boys. Its busiest year on record was 2021, with 21 births.
When was Kj most popular? ▼
Kj was most popular in the 2010s decade with 98 total births. The single peak year was 2021.
How long has the name Kj been used? ▼
Records for Kj go back to 1993, giving 33 years of history through 2025.
What names are similar to Kj? ▼
Names with a similar sound or spelling include Kjell, Kjuan, Kjon, Kjay. These share a common prefix and are also used for boys.
What to do with Kj's data
- Kj's usage has stayed within range of its 2010s decade-level peak (98 total births) through the 2020s (85) -- a comparatively stable name, not a fading trend.
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Kj
Nearby Names Like Kj
Names with a similar sound, spelling, or feel to Kj
Compare Kj side by side: Kj vs Kjell Kj vs Kjuan Kj vs Kjon
Related Names
Names with a similar popularity rank to Kj
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1993–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Kj: #5551 Boys' Name - 229 Births, Peak 2021." NameAlmanac. Accessed via https://namealmanac.com/name/kj. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Kj draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.