The baby name Lou appears in baby name data for the United States from 1910 to 2024. It was most popular in 1953 with 1,962 babies given the name.
In the later years of this period, Lou has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 179 |
| 1911 | 192 |
| 1912 | 246 |
| 1913 | 253 |
| 1914 | 277 |
| 1915 | 371 |
| 1915 | 8 |
| 1916 | 393 |
| 1916 | 9 |
| 1917 | 420 |
| 1917 | 15 |
| 1918 | 477 |
| 1918 | 5 |
| 1919 | 372 |
| 1920 | 397 |
| 1921 | 361 |
| 1922 | 401 |
| 1923 | 333 |
| 1923 | 7 |
| 1924 | 342 |
| 1924 | 5 |
| 1925 | 540 |
| 1926 | 482 |
| 1926 | 6 |
| 1927 | 646 |
| 1928 | 603 |
| 1928 | 10 |
| 1929 | 660 |
| 1929 | 5 |
| 1930 | 649 |
| 1931 | 629 |
| 1931 | 6 |
| 1932 | 771 |
| 1933 | 712 |
| 1933 | 5 |
| 1934 | 712 |
| 1935 | 816 |
| 1935 | 5 |
| 1936 | 665 |
| 1937 | 700 |
| 1938 | 649 |
| 1939 | 606 |
| 1939 | 7 |
| 1940 | 527 |
| 1940 | 6 |
| 1941 | 583 |
| 1942 | 562 |
| 1942 | 15 |
| 1943 | 607 |
| 1943 | 7 |
| 1944 | 478 |
| 1945 | 404 |
| 1945 | 11 |
| 1946 | 478 |
| 1946 | 6 |
| 1947 | 542 |
| 1947 | 15 |
| 1948 | 440 |
| 1949 | 464 |
| 1950 | 487 |
| 1951 | 546 |
| 1951 | 5 |
| 1952 | 703 |
| 1952 | 7 |
| 1953 | 1,962 |
| 1953 | 7 |
| 1954 | 1,947 |
| 1954 | 10 |
| 1955 | 1,517 |
| 1955 | 16 |
| 1956 | 1,382 |
| 1956 | 5 |
| 1957 | 1,164 |
| 1957 | 40 |
| 1958 | 1,103 |
| 1958 | 33 |
| 1959 | 930 |
| 1959 | 13 |
| 1960 | 778 |
| 1960 | 16 |
| 1961 | 620 |
| 1961 | 14 |
| 1962 | 502 |
| 1962 | 13 |
| 1963 | 422 |
| 1964 | 295 |
| 1964 | 6 |
| 1965 | 219 |
| 1966 | 164 |
| 1966 | 11 |
| 1967 | 181 |
| 1967 | 7 |
| 1968 | 170 |
| 1968 | 6 |
| 1969 | 168 |
| 1970 | 161 |
| 1970 | 6 |
| 1971 | 119 |
| 1972 | 87 |
| 1972 | 6 |
| 1973 | 39 |
| 1974 | 5 |
| 1975 | 24 |
| 1976 | 24 |
| 1977 | 6 |
| 1978 | 6 |
| 1982 | 8 |
| 2004 | 5 |
| 2010 | 5 |
| 2015 | 5 |
| 2015 | 5 |
| 2016 | 15 |
| 2017 | 18 |
| 2020 | 10 |
| 2020 | 12 |
| 2021 | 10 |
| 2021 | 6 |
| 2022 | 17 |
| 2022 | 10 |
| 2023 | 16 |
| 2023 | 14 |
| 2024 | 12 |
| 2024 | 8 |