The baby name Lois appears in baby name data for the United States from 1910 to 2024. It was most popular in 1927 with 15,531 babies given the name.
In the later years of this period, Lois has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 1,927 |
| 1910 | 6 |
| 1911 | 2,327 |
| 1912 | 2,978 |
| 1912 | 9 |
| 1913 | 3,557 |
| 1913 | 14 |
| 1914 | 4,820 |
| 1914 | 37 |
| 1915 | 6,685 |
| 1915 | 58 |
| 1916 | 7,165 |
| 1916 | 47 |
| 1917 | 7,634 |
| 1917 | 56 |
| 1918 | 8,116 |
| 1918 | 65 |
| 1919 | 8,160 |
| 1919 | 41 |
| 1920 | 8,588 |
| 1920 | 24 |
| 1921 | 9,063 |
| 1921 | 38 |
| 1922 | 8,436 |
| 1922 | 38 |
| 1923 | 9,944 |
| 1923 | 63 |
| 1924 | 12,063 |
| 1924 | 58 |
| 1925 | 13,044 |
| 1925 | 45 |
| 1926 | 14,240 |
| 1926 | 29 |
| 1927 | 15,531 |
| 1927 | 51 |
| 1928 | 15,456 |
| 1928 | 52 |
| 1929 | 15,303 |
| 1929 | 38 |
| 1930 | 15,029 |
| 1930 | 41 |
| 1931 | 13,070 |
| 1931 | 40 |
| 1932 | 13,283 |
| 1932 | 42 |
| 1933 | 12,162 |
| 1933 | 32 |
| 1934 | 10,991 |
| 1934 | 20 |
| 1935 | 10,285 |
| 1935 | 22 |
| 1936 | 9,423 |
| 1937 | 8,976 |
| 1938 | 8,470 |
| 1938 | 10 |
| 1939 | 7,151 |
| 1939 | 35 |
| 1940 | 7,554 |
| 1940 | 8 |
| 1941 | 6,861 |
| 1941 | 5 |
| 1942 | 7,399 |
| 1942 | 7 |
| 1943 | 7,927 |
| 1944 | 6,371 |
| 1944 | 5 |
| 1945 | 5,956 |
| 1946 | 6,603 |
| 1947 | 6,948 |
| 1948 | 6,157 |
| 1949 | 5,991 |
| 1950 | 5,945 |
| 1951 | 5,912 |
| 1952 | 5,710 |
| 1953 | 5,490 |
| 1954 | 4,843 |
| 1955 | 4,108 |
| 1956 | 4,103 |
| 1957 | 3,707 |
| 1958 | 3,417 |
| 1959 | 3,182 |
| 1960 | 2,922 |
| 1961 | 2,750 |
| 1962 | 2,233 |
| 1963 | 1,800 |
| 1964 | 1,658 |
| 1965 | 1,435 |
| 1966 | 1,086 |
| 1967 | 890 |
| 1968 | 770 |
| 1969 | 643 |
| 1970 | 616 |
| 1971 | 563 |
| 1972 | 373 |
| 1973 | 325 |
| 1974 | 272 |
| 1975 | 194 |
| 1976 | 142 |
| 1977 | 157 |
| 1978 | 204 |
| 1979 | 142 |
| 1980 | 94 |
| 1981 | 162 |
| 1982 | 132 |
| 1983 | 111 |
| 1984 | 79 |
| 1985 | 120 |
| 1986 | 96 |
| 1987 | 60 |
| 1988 | 46 |
| 1989 | 76 |
| 1990 | 43 |
| 1991 | 62 |
| 1992 | 28 |
| 1993 | 29 |
| 1994 | 75 |
| 1995 | 37 |
| 1996 | 39 |
| 1997 | 74 |
| 1998 | 61 |
| 1999 | 11 |
| 2000 | 35 |
| 2001 | 24 |
| 2002 | 10 |
| 2003 | 22 |
| 2004 | 8 |
| 2005 | 15 |
| 2006 | 25 |
| 2007 | 25 |
| 2008 | 52 |
| 2009 | 17 |
| 2010 | 7 |
| 2011 | 17 |
| 2012 | 17 |
| 2013 | 12 |
| 2014 | 47 |
| 2015 | 61 |
| 2016 | 59 |
| 2017 | 87 |
| 2018 | 70 |
| 2019 | 64 |
| 2020 | 52 |
| 2021 | 63 |
| 2022 | 51 |
| 2023 | 52 |
| 2024 | 75 |