Reiko is a rare girls' name that peaked in 1975 and has since faded.
Reiko is predominantly a girl name. It last appears in U.S. records in 2023. Reiko was first reported in SSA data in 1921 and peaked in 1975 (23 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2023 | 9 | 9 | #10,992 | — |
| 2021 | 15 | 15 | #11,969 | #10,547 |
| 2020 | 11 | 11 | #9,411 | — |
| 2019 | 6 | 6 | #15,187 | — |
| 2018 | 8 | 8 | #12,261 | — |
| 2017 | 5 | 5 | #17,900 | — |
| 2016 | 6 | 6 | #15,840 | — |
| 2015 | 6 | 6 | #16,016 | — |
| 2014 | 6 | 6 | #16,117 | — |
| 2013 | 7 | 7 | #14,286 | — |
| 2012 | 10 | 10 | #11,079 | — |
| 2011 | 5 | 5 | #18,964 | — |
| 2009 | 5 | 5 | #19,576 | — |
| 2008 | 14 | 14 | #13,553 | #12,238 |
| 2007 | 6 | 6 | #17,147 | — |
| 2004 | 9 | 9 | #11,423 | — |
| 2003 | 6 | 6 | #15,336 | — |
| 2002 | 8 | 8 | #11,947 | — |
| 2001 | 7 | 7 | #13,169 | — |
| 2000 | 6 | 6 | #14,608 | — |
| 1999 | 7 | 7 | #12,366 | — |
| 1998 | 9 | 9 | #9,913 | — |
| 1997 | 11 | — | #8,199 | — |
| 1996 | 9 | — | #9,396 | — |
| 1995 | 5 | — | #15,183 | — |
| 1994 | 8 | — | #10,301 | — |
| 1993 | 7 | — | #11,482 | — |
| 1992 | 8 | — | #10,235 | — |
| 1990 | 9 | — | #9,046 | — |
| 1989 | 11 | — | #7,328 | — |
| 1988 | 11 | — | #7,004 | — |
| 1987 | 5 | — | #12,742 | — |
| 1986 | 5 | — | #12,317 | — |
| 1985 | 6 | — | #10,311 | — |
| 1984 | 6 | — | #10,042 | — |
| 1983 | 8 | — | #7,853 | — |
| 1982 | 6 | — | #10,143 | — |
| 1981 | 8 | — | #7,948 | — |
| 1980 | 7 | — | #8,825 | — |
| 1979 | 14 | — | #5,030 | — |
| 1978 | 11 | — | #5,864 | — |
| 1977 | 10 | — | #6,221 | — |
| 1976 | 15 | — | #4,297 | — |
| 1975 | 29 | — | #3,131 | #5,318 |
| 1974 | 9 | — | #6,117 | — |
| 1973 | 10 | — | #5,483 | — |
| 1972 | 21 | — | #3,148 | — |
| 1971 | 14 | — | #4,262 | — |
| 1970 | 12 | — | #4,702 | — |
| 1969 | 9 | — | #5,353 | — |
| 1968 | 8 | — | #5,517 | — |
| 1967 | 10 | — | #4,546 | — |
| 1966 | 9 | — | #4,778 | — |
| 1965 | 7 | — | #5,682 | — |
| 1963 | 7 | — | #5,752 | — |
| 1962 | 7 | — | #5,720 | — |
| 1960 | 7 | — | #5,583 | — |
| 1945 | 9 | — | #3,338 | — |
| 1944 | 11 | — | #2,911 | — |
| 1943 | 8 | — | #3,752 | — |
| 1942 | 7 | — | #4,038 | — |
| 1941 | 11 | — | #2,809 | — |
| 1940 | 6 | — | #4,251 | — |
| 1939 | 9 | — | #3,102 | — |
| 1938 | 6 | — | #4,246 | — |
| 1937 | 8 | — | #3,376 | — |
| 1936 | 13 | — | #2,366 | — |
| 1935 | 8 | — | #3,374 | — |
| 1934 | 8 | — | #3,404 | — |
| 1933 | 9 | — | #3,068 | — |
| 1932 | 6 | — | #4,322 | — |
| 1931 | 10 | — | #2,938 | — |
| 1930 | 9 | — | #3,280 | — |
| 1928 | 11 | — | #2,921 | — |
| 1927 | 8 | — | #3,810 | — |
| 1926 | 5 | — | #5,486 | — |
| 1924 | 7 | — | #4,363 | — |
| 1922 | 6 | — | #4,908 | — |
| 1921 | 5 | — | #5,712 | — |