The baby name Lassie appears in baby name data for the United States from 1910 to 1940. It was most popular in 1916 with 41 babies given the name.
In the later years of this period, Lassie has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 11 |
| 1912 | 12 |
| 1915 | 30 |
| 1916 | 41 |
| 1917 | 16 |
| 1918 | 22 |
| 1919 | 12 |
| 1920 | 7 |
| 1921 | 16 |
| 1922 | 24 |
| 1923 | 8 |
| 1924 | 6 |
| 1925 | 5 |
| 1928 | 25 |
| 1931 | 7 |
| 1932 | 5 |
| 1940 | 6 |