The baby name Theo appears in baby name data for the United States from 1910 to 2024. It was most popular in 2024 with 4,425 babies given the name.
In the later years of this period, Theo has become more popular compared with earlier years.
| Year | Count |
|---|---|
| 1910 | 5 |
| 1910 | 30 |
| 1911 | 17 |
| 1911 | 15 |
| 1912 | 20 |
| 1912 | 23 |
| 1913 | 7 |
| 1913 | 37 |
| 1914 | 36 |
| 1914 | 64 |
| 1915 | 61 |
| 1915 | 65 |
| 1916 | 51 |
| 1916 | 85 |
| 1917 | 48 |
| 1917 | 76 |
| 1918 | 66 |
| 1918 | 89 |
| 1919 | 89 |
| 1919 | 83 |
| 1920 | 50 |
| 1920 | 82 |
| 1921 | 24 |
| 1921 | 90 |
| 1922 | 50 |
| 1922 | 93 |
| 1923 | 5 |
| 1923 | 85 |
| 1924 | 76 |
| 1924 | 76 |
| 1925 | 40 |
| 1925 | 111 |
| 1926 | 37 |
| 1926 | 104 |
| 1927 | 37 |
| 1927 | 73 |
| 1928 | 10 |
| 1928 | 66 |
| 1929 | 27 |
| 1929 | 70 |
| 1930 | 12 |
| 1930 | 128 |
| 1931 | 20 |
| 1931 | 68 |
| 1932 | 14 |
| 1932 | 39 |
| 1933 | 17 |
| 1934 | 17 |
| 1935 | 5 |
| 1935 | 29 |
| 1936 | 34 |
| 1937 | 5 |
| 1938 | 30 |
| 1939 | 12 |
| 1940 | 5 |
| 1941 | 7 |
| 1942 | 11 |
| 1943 | 30 |
| 1944 | 11 |
| 1945 | 6 |
| 1945 | 5 |
| 1946 | 17 |
| 1947 | 10 |
| 1947 | 15 |
| 1948 | 12 |
| 1949 | 6 |
| 1950 | 24 |
| 1952 | 12 |
| 1953 | 6 |
| 1955 | 6 |
| 1956 | 16 |
| 1957 | 10 |
| 1959 | 10 |
| 1960 | 5 |
| 1969 | 6 |
| 1975 | 6 |
| 1976 | 11 |
| 1977 | 20 |
| 1978 | 10 |
| 1985 | 15 |
| 1986 | 38 |
| 1987 | 15 |
| 1988 | 45 |
| 1989 | 31 |
| 1990 | 15 |
| 1991 | 19 |
| 1992 | 36 |
| 1993 | 10 |
| 1994 | 10 |
| 1995 | 15 |
| 1996 | 5 |
| 1997 | 19 |
| 1998 | 18 |
| 1999 | 6 |
| 2000 | 27 |
| 2001 | 20 |
| 2002 | 34 |
| 2003 | 48 |
| 2004 | 52 |
| 2005 | 50 |
| 2006 | 85 |
| 2007 | 122 |
| 2008 | 113 |
| 2009 | 114 |
| 2010 | 152 |
| 2011 | 182 |
| 2012 | 252 |
| 2013 | 345 |
| 2014 | 544 |
| 2015 | 817 |
| 2016 | 1,156 |
| 2017 | 1,512 |
| 2018 | 1,935 |
| 2019 | 2,465 |
| 2020 | 2,379 |
| 2021 | 15 |
| 2021 | 3,027 |
| 2022 | 5 |
| 2022 | 4,038 |
| 2023 | 4,379 |
| 2024 | 4,425 |