Deforest is a boy name. It last appeared in U.S. Social Security records in 2001. Deforest first appears in the data in 1881 and reached its peak in 1920 (26 births). The chart below shows how the name has risen and fallen over time.
| Year | U.S. births | Rank |
|---|---|---|
| 2001 | 5 | #24,044 |
| 1995 | 7 | #16,287 |
| 1994 | 8 | #14,894 |
| 1993 | 5 | #20,359 |
| 1992 | 7 | #15,941 |
| 1991 | 7 | #15,634 |
| 1979 | 5 | #14,920 |
| 1974 | 6 | #11,251 |
| 1973 | 5 | #12,368 |
| 1972 | 6 | #10,792 |
| 1971 | 8 | #8,927 |
| 1970 | 7 | #9,377 |
| 1967 | 6 | #8,791 |
| 1966 | 6 | #8,553 |
| 1965 | 9 | #6,728 |
| 1962 | 5 | #9,635 |
| 1961 | 5 | #9,662 |
| 1958 | 5 | #9,114 |
| 1956 | 6 | #8,050 |
| 1955 | 5 | #8,798 |
| 1953 | 8 | #6,522 |
| 1952 | 8 | #6,405 |
| 1951 | 9 | #5,882 |
| 1950 | 7 | #6,697 |
| 1949 | 13 | #4,638 |
| 1948 | 8 | #6,111 |
| 1947 | 15 | #4,348 |
| 1945 | 7 | #5,850 |
| 1944 | 11 | #4,593 |
| 1943 | 8 | #5,655 |
| 1942 | 6 | #6,602 |
| 1941 | 5 | #7,105 |
| 1940 | 6 | #6,287 |
| 1939 | 8 | #5,245 |
| 1938 | 7 | #5,714 |
| 1937 | 6 | #6,276 |
| 1935 | 16 | #3,513 |
| 1934 | 20 | #3,068 |
| 1933 | 9 | #4,942 |
| 1932 | 14 | #3,923 |
| 1931 | 9 | #5,119 |
| 1930 | 5 | #7,648 |
| 1929 | 18 | #3,516 |
| 1928 | 15 | #4,017 |
| 1927 | 18 | #3,706 |
| 1926 | 14 | #4,316 |
| 1925 | 14 | #4,369 |
| 1924 | 15 | #4,257 |
| 1923 | 14 | #4,398 |
| 1922 | 16 | #4,089 |
| 1921 | 24 | #3,165 |
| 1920 | 26 | #2,957 |
| 1919 | 24 | #2,992 |
| 1918 | 15 | #4,089 |
| 1917 | 23 | #2,952 |
| 1916 | 8 | #5,654 |
| 1915 | 18 | #3,278 |
| 1914 | 17 | #2,953 |
| 1913 | 12 | #3,174 |
| 1912 | 5 | #5,018 |
| 1911 | 5 | #3,861 |
| 1908 | 6 | #2,869 |
| 1904 | 6 | #2,583 |
| 1894 | 5 | #2,442 |
| 1891 | 6 | #2,001 |
| 1890 | 6 | #2,027 |
| 1881 | 9 | #1,221 |