The baby name Lanny appears in baby name data for the United States from 1934 to 1980. It was most popular in 1949 with 658 babies given the name.
In the later years of this period, Lanny has become less common than it once was.
| Year | Count |
|---|---|
| 1934 | 43 |
| 1935 | 55 |
| 1936 | 93 |
| 1937 | 157 |
| 1938 | 161 |
| 1939 | 212 |
| 1940 | 359 |
| 1941 | 453 |
| 1942 | 528 |
| 1943 | 340 |
| 1944 | 283 |
| 1945 | 234 |
| 1946 | 334 |
| 1947 | 391 |
| 1948 | 346 |
| 1949 | 658 |
| 1950 | 634 |
| 1951 | 504 |
| 1952 | 374 |
| 1953 | 368 |
| 1954 | 186 |
| 1955 | 287 |
| 1956 | 304 |
| 1957 | 174 |
| 1958 | 234 |
| 1959 | 132 |
| 1960 | 205 |
| 1961 | 106 |
| 1962 | 94 |
| 1963 | 68 |
| 1964 | 71 |
| 1965 | 62 |
| 1966 | 75 |
| 1967 | 76 |
| 1968 | 30 |
| 1969 | 48 |
| 1970 | 61 |
| 1971 | 22 |
| 1972 | 34 |
| 1973 | 25 |
| 1974 | 30 |
| 1975 | 12 |
| 1976 | 18 |
| 1977 | 22 |
| 1979 | 7 |
| 1980 | 12 |