Meaning not yet researched.
Theo: US boys given the name each year, 1880 to 2025, from Social Security card applications. 3,945 in 2025. Its best rank was #78 in 2023.
US births per year · SSA card applications
Peaked at #78 in 2023; #82 in 2025. About 99% of babies named Theo in 2025 were boys.
Baby name · US data 1880–2025
#82 for US boys in 2025. Its best year was 2023, at #78.
Hover, tap or use the arrow keys for any year. Years with fewer than five babies of a sex are not published by SSA and show as zero.
Theo: US boys given the name each year from 1880 to 2025. 3,945 boys in 2025. Peak: #78 in 2023 · most boys in one year: 4,140 (2023).
In 2025, 3,945 US boys were named Theo, making it the 82nd most common boys’ name of the year, down 2 places from #80 in 2024. That is 184 fewer than the 4,129 boys named Theo in 2024. Its best rank for boys was #78, reached in 2023. That year also had the most boys given the name: 4,140. For comparison, it was #406 in 2015 and #1,122 in 1950.
Social Security card records list Theo in every one of the 146 years from 1880 to 2025; in 1880 there were 16 babies with the name. In all, 39,333 US babies have been given the name, 8.9% of them girls and 91% boys. Its busiest decade was the 2020s, with 21,036 babies named Theo.
Over the 10 years from 2016 to 2025, 26,540 US boys were named Theo; the busiest of those years was 2023, with 4,140. In 2025 that was about 1 in 433 of the boys in SSA’s list for the year.
Among the states, Theo ranked highest in Hawaii in 2025, at #27 for boys there. It was in the top 100 in 30 states (counting DC). Related spellings in the SSA files include Teo (2,987 babies since 1880), Thea (20,118 babies since 1880), Tye (5,580 babies since 1880) and Tea (2,493 babies since 1880). Rarer spellings such as Thia, Tiea and Teea are summarised on this page. The open nickname list we use links it to Theodore.
Meaning not yet researched.
We publish a meaning only with a cited source and a confidence label, and never generate one. Meanings are being researched for the most common names first.
Rare spellings summarised here: Thia (339), Tiea (75), Teea (66), Theya (16), Theobald (10).
Numbers are all-time US births. Links come from Wikidata’s “said to be the same as” (P460, CC0) and our spelling rule: at most two letters different, with the same sound pattern.
Theo is listed as a nickname for Theodore, Theodosia.
Source: carltonnorthern/nicknames (Apache-2.0).
US boys. Rank within each state. SSA leaves out states where fewer than five boys got the name, so 2 are not listed.
| State | Births 2025 | Rank 2025 | Rank 2015 |
|---|---|---|---|
| Hawaii | 23 | #27 | — |
| Massachusetts | 138 | #41 | #221 |
| Utah | 83 | #49 | #317 |
| Connecticut | 61 | #53 | #318 |
| Iowa | 55 | #59 | #248 |
| District of Columbia | 14 | #59 | #289 |
| New York | 258 | #64 | #322 |
| Wisconsin | 87 | #65 | #314 |
| New Jersey | 132 | #66 | #393 |
| Indiana | 101 | #70 | #369 |
| Illinois | 154 | #72 | #350 |
| Washington | 100 | #72 | #301 |
| Oregon | 49 | #74 | #308 |
| Pennsylvania | 161 | #74 | #359 |
| Florida | 258 | #77 | #672 |
| California | 484 | #77 | #344 |
| Oklahoma | 53 | #79 | #696 |
| Idaho | 29 | #79 | — |
| Michigan | 110 | #82 | #340 |
| South Dakota | 15 | #83 | #180 |
| Colorado | 79 | #84 | #285 |
| North Dakota | 14 | #84 | #199 |
| Maryland | 63 | #85 | #339 |
| Ohio | 136 | #88 | #618 |
| Maine | 15 | #89 | — |
| Missouri | 71 | #90 | #407 |
| Delaware | 12 | #91 | — |
| North Carolina | 133 | #92 | #503 |
| Nevada | 32 | #97 | — |
| New Hampshire | 16 | #98 | — |
| Alaska | 8 | #108 | #192 |
| Minnesota | 59 | #108 | #209 |
| Kentucky | 51 | #109 | — |
| Rhode Island | 11 | #111 | — |
| Virginia | 76 | #113 | #538 |
| Arizona | 73 | #117 | #720 |
| Tennessee | 79 | #119 | #1,033 |
| Texas | 315 | #124 | #642 |
| South Carolina | 44 | #127 | — |
| Georgia | 94 | #128 | #656 |
| Louisiana | 39 | #129 | — |
| Kansas | 31 | #130 | #509 |
| West Virginia | 15 | #139 | — |
| Montana | 10 | #145 | — |
| Nebraska | 19 | #147 | #315 |
| New Mexico | 14 | #147 | — |
| Arkansas | 24 | #158 | #635 |
| Mississippi | 15 | #212 | — |
| Alabama | 25 | #231 | — |
Births and national rank for each year SSA lists the name, newest first.
| Year | Girls | Girls rank | Boys | Boys rank |
|---|---|---|---|---|
| 2025 | 21 | #5,894 | 3,945 | #82 |
| 2024 | 31 | #4,554 | 4,129 | #80 |
| 2023 | 42 | #3,705 | 4,140 | #78 |
| 2022 | 50 | #3,276 | 3,642 | #98 |
| 2021 | 64 | #2,708 | 2,703 | #142 |
| 2020 | 44 | #3,493 | 2,225 | #172 |
| 2019 | 31 | #4,534 | 2,018 | #195 |
| 2018 | 7 | #13,679 | 1,554 | #243 |
| 2017 | 7 | #13,992 | 1,232 | #290 |
| 2016 | 11 | #10,057 | 952 | #354 |
| 2015 | — | — | 765 | #406 |
| 2014 | — | — | 550 | #509 |
| 2013 | — | — | 365 | #663 |
| 2012 | — | — | 287 | #790 |
| 2011 | — | — | 245 | #863 |
| 2010 | — | — | 221 | #918 |
| 2009 | — | — | 187 | #1,033 |
| 2008 | — | — | 188 | #1,022 |
| 2007 | — | — | 191 | #1,012 |
| 2006 | — | — | 156 | #1,120 |
| 2005 | — | — | 139 | #1,154 |
| 2004 | — | — | 133 | #1,178 |
| 2003 | — | — | 109 | #1,295 |
| 2002 | 5 | #17,892 | 98 | #1,355 |
| 2001 | — | — | 84 | #1,471 |
| 2000 | — | — | 101 | #1,289 |
| 1999 | — | — | 76 | #1,502 |
| 1998 | — | — | 63 | #1,664 |
| 1997 | — | — | 62 | #1,645 |
| 1996 | — | — | 53 | #1,761 |
| 1995 | — | — | 56 | #1,646 |
| 1994 | — | — | 54 | #1,688 |
| 1993 | — | — | 50 | #1,739 |
| 1992 | — | — | 59 | #1,523 |
| 1991 | 5 | #15,259 | 61 | #1,466 |
| 1990 | — | — | 66 | #1,382 |
| 1989 | — | — | 77 | #1,227 |
| 1988 | — | — | 77 | #1,153 |
| 1987 | — | — | 75 | #1,112 |
| 1986 | — | — | 85 | #1,006 |
| 1985 | — | — | 76 | #1,063 |
| 1984 | — | — | 23 | #2,285 |
| 1983 | — | — | 27 | #2,011 |
| 1982 | — | — | 33 | #1,769 |
| 1981 | — | — | 31 | #1,859 |
| 1980 | — | — | 36 | #1,651 |
| 1979 | 6 | #10,115 | 38 | #1,565 |
| 1978 | — | — | 46 | #1,368 |
| 1977 | — | — | 51 | #1,248 |
| 1976 | — | — | 58 | #1,122 |
| 1975 | 6 | #8,968 | 57 | #1,124 |
| 1974 | — | — | 32 | #1,577 |
| 1973 | — | — | 27 | #1,731 |
| 1972 | — | — | 26 | #1,765 |
| 1971 | — | — | 23 | #1,908 |
| 1970 | 7 | #7,003 | 28 | #1,654 |
| 1969 | 5 | #8,589 | 29 | #1,525 |
| 1968 | — | — | 24 | #1,643 |
| 1967 | — | — | 29 | #1,443 |
| 1966 | 6 | #6,498 | 23 | #1,647 |
| 1965 | — | — | 43 | #1,161 |
| 1964 | 13 | #3,866 | 39 | #1,260 |
| 1963 | 8 | #5,256 | 32 | #1,398 |
| 1962 | 12 | #3,995 | 26 | #1,586 |
| 1961 | 16 | #3,309 | 36 | #1,346 |
| 1960 | 7 | #5,653 | 42 | #1,226 |
| 1959 | 8 | #4,995 | 36 | #1,320 |
| 1958 | 11 | #3,909 | 35 | #1,320 |
| 1957 | 20 | #2,641 | 37 | #1,298 |
| 1956 | 11 | #3,891 | 39 | #1,230 |
| 1955 | 23 | #2,337 | 33 | #1,337 |
| 1954 | 16 | #2,881 | 30 | #1,405 |
| 1953 | 18 | #2,585 | 33 | #1,327 |
| 1952 | 18 | #2,573 | 41 | #1,165 |
| 1951 | 18 | #2,467 | 46 | #1,066 |
| 1950 | 31 | #1,713 | 41 | #1,122 |
| 1949 | 22 | #2,128 | 36 | #1,201 |
| 1948 | 33 | #1,645 | 47 | #1,034 |
| 1947 | 35 | #1,628 | 39 | #1,175 |
| 1946 | 31 | #1,615 | 43 | #1,057 |
| 1945 | 53 | #1,094 | 48 | #941 |
| 1944 | 27 | #1,605 | 44 | #988 |
| 1943 | 33 | #1,465 | 61 | #854 |
| 1942 | 26 | #1,664 | 45 | #1,003 |
| 1941 | 34 | #1,332 | 39 | #1,047 |
| 1940 | 32 | #1,345 | 38 | #1,063 |
| 1939 | 27 | #1,470 | 64 | #762 |
| 1938 | 19 | #1,867 | 64 | #769 |
| 1937 | 33 | #1,276 | 40 | #1,011 |
| 1936 | 30 | #1,342 | 73 | #697 |
| 1935 | 39 | #1,133 | 71 | #729 |
| 1934 | 39 | #1,146 | 55 | #852 |
| 1933 | 39 | #1,137 | 62 | #781 |
| 1932 | 41 | #1,126 | 76 | #719 |
| 1931 | 43 | #1,090 | 85 | #649 |
| 1930 | 55 | #1,000 | 90 | #653 |
| 1929 | 71 | #847 | 75 | #728 |
| 1928 | 62 | #952 | 92 | #657 |
| 1927 | 58 | #1,008 | 109 | #596 |
| 1926 | 90 | #766 | 104 | #618 |
| 1925 | 102 | #734 | 98 | #644 |
| 1924 | 111 | #707 | 97 | #656 |
| 1923 | 75 | #851 | 92 | #670 |
| 1922 | 102 | #721 | 109 | #619 |
| 1921 | 96 | #749 | 107 | #615 |
| 1920 | 98 | #731 | 97 | #645 |
| 1919 | 109 | #672 | 92 | #637 |
| 1918 | 105 | #707 | 87 | #665 |
| 1917 | 91 | #739 | 89 | #631 |
| 1916 | 98 | #694 | 96 | #596 |
| 1915 | 98 | #668 | 91 | #604 |
| 1914 | 64 | #722 | 81 | #554 |
| 1913 | 50 | #746 | 62 | #551 |
| 1912 | 53 | #695 | 50 | #572 |
| 1911 | 36 | #731 | 31 | #546 |
| 1910 | 29 | #810 | 35 | #472 |
| 1909 | 44 | #586 | 22 | #572 |
| 1908 | 24 | #808 | 34 | #412 |
| 1907 | 31 | #689 | 29 | #436 |
| 1906 | 27 | #714 | 17 | #585 |
| 1905 | 34 | #608 | 23 | #475 |
| 1904 | 31 | #627 | 27 | #407 |
| 1903 | 29 | #627 | 18 | #523 |
| 1902 | 35 | #557 | 24 | #425 |
| 1901 | 19 | #765 | 18 | #464 |
| 1900 | 22 | #798 | 14 | #696 |
| 1899 | 16 | #830 | 10 | #709 |
| 1898 | 25 | #665 | 16 | #537 |
| 1897 | 28 | #581 | 11 | #676 |
| 1896 | 24 | #650 | 12 | #670 |
| 1895 | 25 | #620 | 14 | #577 |
| 1894 | 17 | #738 | 12 | #624 |
| 1893 | 19 | #686 | 11 | #646 |
| 1892 | 25 | #563 | 9 | #789 |
| 1891 | 21 | #585 | 11 | #589 |
| 1890 | 12 | #820 | 12 | #599 |
| 1889 | 18 | #616 | 8 | #783 |
| 1888 | 17 | #631 | 9 | #750 |
| 1887 | 19 | #522 | 10 | #627 |
| 1886 | 15 | #603 | 8 | #751 |
| 1885 | 11 | #694 | 8 | #759 |
| 1884 | 16 | #539 | 7 | #839 |
| 1883 | 7 | #813 | 14 | #493 |
| 1882 | 10 | #631 | 12 | #573 |
| 1881 | 8 | #670 | 8 | #697 |
| 1880 | 7 | #730 | 9 | #680 |
About the data: counts are Social Security card applications for US births, for names given to at least five babies of a sex in a year (SSA, names.zip, public domain). Ranks follow SSA’s own order: most births first, ties alphabetical. Files retrieved 2026-10-05 (checksum on our sources page).