Cassius
Cassius was given to 504 boys in 2025, #583 among boys’ names; 9,766 Americans have been recorded with it since 1880 (Social Security Administration, published May 2026).
An estimated 9,180 Americans named Cassius and born in the U.S. are alive in 2026 (94% of everyone recorded); the median is 9 years old and half are between 5 and 16.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Cassius by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Cassius mean?
Wiktionary, English section
Cassius is “a male given name from Latin.”
Borrowed from Latin Cassius, a Roman name derived from the gens Cassia.
/ˈkæsi.əs/
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Cassius?
#583 among boys’ names, 2025
Cassius rose from #644 in 2015 to #583 in 2025 among boys’ names; its share of boys born rose from 0.21 to 0.30 per 1,000.
612 babies in 2021, the peak
Cassius peaked in 2021, when 612 babies were given it (607 boys, #487 among boys’ names). The 504 births of 2025 are 82% of that peak.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2025 | 504 | #583 | 0.30 |
| 2024 | 516 | #569 | 0.30 |
| 2023 | 509 | #576 | 0.30 |
| 2022 | 541 | #549 | 0.31 |
| 2021 | 607 | #487 | 0.35 |
| 2020 | 602 | #488 | 0.35 |
| 2019 | 554 | #514 | 0.31 |
| 2018 | 460 | #595 | 0.25 |
| 2017 | 467 | #582 | 0.25 |
| 2016 | 449 | #600 | 0.24 |
Every recorded year (117)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2015 | 406 | #644 | 0.21 |
| 2014 | 346 | #704 | 0.18 |
| 2013 | 300 | #757 | 0.16 |
| 2012 | 218 | #934 | 0.11 |
| 2011 | 240 | #873 | 0.13 |
| 2010 | 195 | #1,006 | 0.10 |
| 2009 | 199 | #993 | 0.10 |
| 2008 | 213 | #946 | 0.10 |
| 2007 | 164 | #1,115 | 0.08 |
| 2006 | 169 | #1,059 | 0.08 |
| 2005 | 102 | #1,442 | 0.05 |
| 2004 | 95 | #1,455 | 0.05 |
| 2003 | 79 | #1,594 | 0.04 |
| 2002 | 85 | #1,481 | 0.04 |
| 2001 | 59 | #1,871 | 0.03 |
| 2000 | 60 | #1,797 | 0.03 |
| 1999 | 47 | #2,028 | 0.02 |
| 1998 | 52 | #1,873 | 0.03 |
| 1997 | 45 | #1,991 | 0.02 |
| 1996 | 42 | #2,042 | 0.02 |
| 1995 | 34 | #2,297 | 0.02 |
| 1994 | 26 | #2,773 | 0.01 |
| 1993 | 42 | #1,937 | 0.02 |
| 1992 | 44 | #1,844 | 0.02 |
| 1991 | 45 | #1,768 | 0.02 |
| 1990 | 42 | #1,837 | 0.02 |
| 1989 | 25 | #2,543 | 0.01 |
| 1988 | 27 | #2,253 | 0.01 |
| 1987 | 23 | #2,402 | 0.01 |
| 1986 | 27 | #2,104 | 0.01 |
| 1985 | 16 | #2,960 | 0.01 |
| 1984 | 24 | #2,169 | 0.01 |
| 1983 | 19 | #2,503 | 0.01 |
| 1982 | 17 | #2,720 | 0.01 |
| 1981 | 22 | #2,278 | 0.01 |
| 1980 | 11 | #3,649 | 0.01 |
| 1979 | 16 | #2,789 | 0.01 |
| 1978 | 18 | #2,488 | 0.01 |
| 1977 | 13 | #3,065 | 0.01 |
| 1976 | 20 | #2,252 | 0.01 |
| 1975 | 11 | #3,273 | 0.01 |
| 1974 | 17 | #2,369 | 0.01 |
| 1973 | 12 | #2,872 | 0.01 |
| 1972 | 19 | #2,091 | 0.01 |
| 1971 | 36 | #1,418 | 0.02 |
| 1970 | 27 | #1,660 | 0.01 |
| 1969 | 22 | #1,771 | 0.01 |
| 1968 | 19 | #1,847 | 0.01 |
| 1967 | 43 | #1,136 | 0.02 |
| 1966 | 38 | #1,217 | 0.02 |
| 1965 | 42 | #1,167 | 0.02 |
| 1964 | 78 | #861 | 0.04 |
| 1963 | 27 | #1,513 | 0.01 |
| 1962 | 15 | #2,126 | 0.01 |
| 1961 | 17 | #2,002 | 0.01 |
| 1960 | 8 | #3,127 | under 0.01 |
| 1959 | 9 | #2,851 | under 0.01 |
| 1956 | 6 | #3,587 | under 0.01 |
| 1955 | 8 | #3,001 | under 0.01 |
| 1951 | 5 | #3,793 | under 0.01 |
| 1950 | 6 | #3,370 | under 0.01 |
| 1948 | 13 | #2,129 | 0.01 |
| 1946 | 5 | #3,594 | under 0.01 |
| 1944 | 9 | #2,492 | 0.01 |
| 1943 | 10 | #2,426 | 0.01 |
| 1942 | 7 | #2,970 | 0.01 |
| 1941 | 7 | #2,910 | 0.01 |
| 1940 | 8 | #2,699 | 0.01 |
| 1939 | 6 | #3,166 | 0.01 |
| 1938 | 5 | #3,596 | under 0.01 |
| 1935 | 6 | #3,316 | 0.01 |
| 1932 | 5 | #3,853 | under 0.01 |
| 1931 | 13 | #2,113 | 0.01 |
| 1930 | 12 | #2,318 | 0.01 |
| 1929 | 10 | #2,623 | 0.01 |
| 1928 | 10 | #2,690 | 0.01 |
| 1927 | 8 | #3,202 | 0.01 |
| 1926 | 13 | #2,319 | 0.01 |
| 1925 | 10 | #2,777 | 0.01 |
| 1924 | 9 | #3,056 | 0.01 |
| 1923 | 16 | #2,033 | 0.01 |
| 1922 | 10 | #2,836 | 0.01 |
| 1921 | 10 | #2,835 | 0.01 |
| 1920 | 16 | #2,061 | 0.02 |
| 1919 | 8 | #3,154 | 0.01 |
| 1918 | 16 | #2,010 | 0.02 |
| 1917 | 17 | #1,826 | 0.02 |
| 1916 | 19 | #1,650 | 0.02 |
| 1915 | 10 | #2,479 | 0.01 |
| 1914 | 9 | #2,302 | 0.01 |
| 1913 | 11 | #1,692 | 0.02 |
| 1910 | 5 | #1,630 | 0.03 |
| 1908 | 5 | #1,409 | 0.03 |
| 1895 | 6 | #997 | 0.05 |
| 1893 | 8 | #779 | 0.07 |
| 1892 | 8 | #809 | 0.07 |
| 1891 | 6 | #861 | 0.06 |
| 1890 | 7 | #820 | 0.06 |
| 1889 | 6 | #892 | 0.05 |
| 1888 | 10 | #657 | 0.08 |
| 1887 | 5 | #952 | 0.05 |
| 1885 | 7 | #776 | 0.06 |
| 1884 | 6 | #872 | 0.05 |
| 1883 | 10 | #605 | 0.10 |
| 1882 | 12 | #546 | 0.11 |
| 1881 | 9 | #606 | 0.09 |
| 1880 | 17 | #430 | 0.15 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Cassius a boy’s or a girl’s name?
Cassius has been given almost only to boys: 30 girls in 117 years of records.
Girls and boys named Cassius: the SSA national file counts each sex separately.
How many people are named Cassius, and how old are they?
9,180 alive in 2026, estimated
That is 94% of the 9,766 Americans ever recorded as Cassius. The median Cassius alive today is 9 years old; half are between 5 and 16.
The 2020 Census counted 5,324 people named Cassius (69 women and girls, 5,255 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 6,109 born in the U.S. The Census count is 13% below that prediction. Possible reasons: people who give a short form or another name to the Census, and a survival estimate that can run high.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Silent Generation | 1928-1945 | 19 |
| Baby Boomers | 1946-1964 | 146 |
| Generation X | 1965-1980 | 317 |
| Millennials | 1981-1996 | 453 |
| Generation Z | 1997-2012 | 2,000 |
| Generation Alpha | 2013-2025 | 6,250 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Cassius born?
The states with the most babies named Cassius are California, Texas and Washington, with 26% of its births recorded by state in 2025; Washington is not among the ten states with the most births.
| State | Births 2025 | Rank, boys | vs. national |
|---|---|---|---|
| California | 56 | #547 | 0.9× |
| Texas | 39 | #713 | 0.7× |
| Washington | 28 | #267 | 1.7× |
| New York | 23 | #644 | 0.7× |
| Florida | 22 | #706 | 0.6× |
| Indiana | 22 | #342 | 0.9× |
| Ohio | 21 | #501 | 0.8× |
| Virginia | 18 | #438 | 0.7× |
| Tennessee | 17 | #459 | 0.7× |
| Georgia | 14 | #682 | 0.7× |
Where Cassius is more common than its national share predicts
Relative to its national share, Cassius is most over-represented in Washington: since 1910 it was given 1.7 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Cassius with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 3 names spelled alike, given to 13,292 babies since 1880, Cassius is the most given (73% of them). In 2025 it was given to 504 of their 821 babies (61%), again the most given.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Cassius
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Cassius and names like it
- Compare Cassius and CaiusBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sCassius peaked in 2021.
- California’s most given namesThe state where SSA recorded the most babies named Cassius since 1910.
- Latin namesWiktionary’s origin for Cassius: every such name, by how often it is given.
- The top names of 2021The year the most babies were named Cassius.
- The names of Generation AlphaMost people named Cassius alive today were born 2013-2025.
- Names starting with CMost given first.