Total births
2,250
Unisex name · since 1948
Dia
Since 1948, U.S. Social Security records show 2,250 babies named Dia, peaking in 2015. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #4130
- among girls today
- 2,250
- born since 1948
- 2010s
- peak decade
- 77%
- more common than other girls
2,250 babies have been named Dia since 1948, making it today's #4130 unisex name.
Dia has 2,250 recorded births among girls since 1948, per the U.S. Social Security Administration, ranked #4130 as of the latest data, more common than 77% of girls, 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 1948 to 2025.
- #4130 among girls today
- 2,250 born since 1948
- 2010s peak decade
- 77% more common than other girls
Data updated Jun 2026
The verdict
Dia is currently the #4130 unisex name in America, more common than 77% of girls - 2,250 born since 1948, peaking in the 2010s.
- #4130
- among girls today
- 2,250
- born since 1948
- 2010s
- peak decade
- 77%
- more common than other girls
Dia vs. every other girls name in current SSA rankings
#4130
of 17,726 girls in use
More common than 77% of names given to girls today.
2010s
Peak decade
22% of everyone ever named Dia was born in this single decade.
2015
Single peak year
62 babies were named Dia in 2015 - its busiest year on record.
How Dia compares
2,250 Top 21% higher than 79% of 17,726 names currently given to girls
Based on all-time total births among currently-ranked girls 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
Dia's all-time total is 6x the median girls name, and Olivia still leads by a wide margin.
| Metric | Dia | Median girls name (Emerly) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 2,250 | 382 | 567,345 |
| Peak-year births | 62 | 48 | 19,840 |
Dia's usage pattern, beyond the headline number
Dia splits its recorded history at 1988: 58% of all births land in the more recent half, 42% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1948 (5 births) -- compare that against the 2015 peak of 62 for a sense of just how much the name's popularity has swung.
Dia at a glance
Outside the top 1,000Peak year
2015
Current rank
#4,130
Active since
1948
Dia popularity over time - girls
Annual U.S. births registered with the Social Security Administration · 1948–2025
- Peak year (2015)
- 62
- Annual births at peak, across 78 years of records
Dia popularity over time - boys
117 total births recorded since 1971 (Dia as boys' name)
Dia by decade
Total births in each ten-year window, peak vs trough at a glance
2010s was Dia's strongest decade.
489 babies received the name during that ten-year window, about 22% of all-time use.
Dia births by decade
Total births in each ten-year window
- 1940s 5
1940s
5 births
- 1950s 83
1950s
83 births
- 1960s
1960s
247 births
- 1970s
1970s
391 births
- 1980s
1980s
277 births
- 1990s
1990s
209 births
- 2000s
2000s
284 births
- 2010s
2010s
489 births
- 2020s
2020s
265 births
What this shows Peak: 2010s at 489 births (22% of all-time use).
How Dia compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Dia's total volume
Dia vs 15 similarly-sized girls names
Dia by state
Where Dia concentrates geographically, total births since 1948
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 207 | 9.2% |
| #2 | Texas | | 64 | 2.8% |
| #3 | New York | | 45 | 2.0% |
| #4 | Illinois | | 28 | 1.2% |
| #5 | New Jersey | | 27 | 1.2% |
| #6 | Pennsylvania | | 15 | 0.7% |
| #7 | Georgia | | 11 | 0.5% |
| #8 | Maryland | | 10 | 0.4% |
California share of Dia's total US births 9.2%
Even split
207 of 2,250 births nationwide. Compared to a flat distribution across 12 reporting states.
Dia appears in 12 states. Explore state details →
Frequently Asked Questions
How popular is the name Dia? ▼
Dia has been given to 2,250 babies in the U.S. since 1948, according to SSA data. Among girls, it ranks #4130 as of the latest data. 62 babies were born in 2015, its single highest year.
When was Dia most popular? ▼
Dia was most popular in the 2010s decade with 489 total births. The single peak year was 2015.
Where is Dia most popular? ▼
The top states for the name Dia are California (207 births), Texas (64 births), New York (45 births).
Is Dia a unisex name? ▼
Yes, Dia is used for both boys and girls. As a girl's name it has 2,250 births, and as a boy's name it has 117 births.
How long has the name Dia been used? ▼
Records for Dia go back to 1948, giving 78 years of history through 2025.
What names are similar to Dia? ▼
Names with a similar sound or spelling include Diane, Diana, Dianne, Dianna, and 4 more. These share a common prefix and are also used for girls.
What to do with Dia's data
- Dia's usage has stayed within range of its 2010s decade-level peak (489 total births) through the 2020s (265) -- a comparatively stable name, not a fading trend.
- California records the most Dias (207 births) -- see the full state breakdown if geography matters to your decision. California names
- 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 Dia
Nearby Names Like Dia
Names with a similar sound, spelling, or feel to Dia
Diane Girl
#2251 518,651 births
Diana Girl
#242 368,487 births
Dianne Girl
#8471 95,289 births
Dianna Girl
#2472 56,292 births
Diamond Girl
#1616 33,733 births
Compare Dia side by side: Dia vs Diane Dia vs Diana Dia vs Dianne
Related Names
Names with a similar popularity rank to Dia
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, 1948–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Dia: #4130 Unisex Name - 2,250 Births, Peak 2015." NameAlmanac. Accessed via https://namealmanac.com/name/dia. 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 Dia 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.