The baby name Len appears in baby name data for the United States from 1913 to 1976. It was most popular in 1958 with 90 babies given the name.
Over the period shown, Len has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1913 | 16 |
| 1917 | 6 |
| 1921 | 5 |
| 1924 | 12 |
| 1930 | 20 |
| 1931 | 39 |
| 1932 | 21 |
| 1935 | 10 |
| 1940 | 27 |
| 1941 | 21 |
| 1942 | 21 |
| 1944 | 10 |
| 1945 | 28 |
| 1946 | 5 |
| 1947 | 39 |
| 1948 | 37 |
| 1949 | 34 |
| 1950 | 22 |
| 1952 | 51 |
| 1953 | 29 |
| 1954 | 19 |
| 1955 | 50 |
| 1956 | 33 |
| 1957 | 59 |
| 1958 | 90 |
| 1959 | 49 |
| 1960 | 79 |
| 1961 | 47 |
| 1962 | 44 |
| 1963 | 44 |
| 1964 | 25 |
| 1965 | 17 |
| 1966 | 22 |
| 1967 | 15 |
| 1968 | 38 |
| 1969 | 15 |
| 1970 | 51 |
| 1971 | 16 |
| 1972 | 20 |
| 1976 | 7 |