The baby name Sonja appears in baby name data for the United States from 1921 to 2024. It was most popular in 1970 with 1,671 babies given the name.
In the later years of this period, Sonja has become less common than it once was.
| Year | Count |
|---|---|
| 1921 | 6 |
| 1923 | 10 |
| 1925 | 14 |
| 1927 | 19 |
| 1928 | 28 |
| 1929 | 47 |
| 1930 | 73 |
| 1931 | 29 |
| 1932 | 48 |
| 1933 | 38 |
| 1934 | 51 |
| 1935 | 60 |
| 1936 | 150 |
| 1937 | 645 |
| 1938 | 1,379 |
| 1939 | 1,044 |
| 1940 | 860 |
| 1941 | 659 |
| 1942 | 664 |
| 1943 | 630 |
| 1944 | 418 |
| 1945 | 485 |
| 1946 | 545 |
| 1947 | 564 |
| 1948 | 487 |
| 1949 | 453 |
| 1950 | 407 |
| 1951 | 479 |
| 1952 | 498 |
| 1953 | 460 |
| 1954 | 469 |
| 1955 | 495 |
| 1956 | 583 |
| 1957 | 615 |
| 1958 | 609 |
| 1959 | 850 |
| 1960 | 929 |
| 1961 | 1,073 |
| 1962 | 1,207 |
| 1963 | 1,103 |
| 1964 | 1,220 |
| 1965 | 1,330 |
| 1966 | 1,593 |
| 1967 | 1,579 |
| 1968 | 1,668 |
| 1969 | 1,628 |
| 1970 | 1,671 |
| 1971 | 1,484 |
| 1972 | 1,408 |
| 1973 | 1,049 |
| 1974 | 910 |
| 1975 | 716 |
| 1976 | 662 |
| 1977 | 565 |
| 1978 | 506 |
| 1979 | 485 |
| 1980 | 397 |
| 1981 | 393 |
| 1982 | 338 |
| 1983 | 259 |
| 1984 | 171 |
| 1985 | 313 |
| 1986 | 298 |
| 1987 | 281 |
| 1988 | 251 |
| 1989 | 205 |
| 1990 | 193 |
| 1991 | 159 |
| 1992 | 163 |
| 1993 | 115 |
| 1994 | 102 |
| 1995 | 55 |
| 1996 | 89 |
| 1997 | 114 |
| 1998 | 135 |
| 1999 | 86 |
| 2000 | 79 |
| 2001 | 51 |
| 2002 | 43 |
| 2003 | 39 |
| 2004 | 77 |
| 2005 | 44 |
| 2006 | 74 |
| 2007 | 37 |
| 2008 | 68 |
| 2009 | 51 |
| 2010 | 77 |
| 2011 | 60 |
| 2012 | 68 |
| 2013 | 50 |
| 2014 | 44 |
| 2015 | 21 |
| 2016 | 36 |
| 2017 | 24 |
| 2018 | 25 |
| 2019 | 23 |
| 2020 | 27 |
| 2021 | 12 |
| 2022 | 8 |
| 2023 | 10 |
| 2024 | 18 |