The baby name Madlyn appears in baby name data for the United States from 1913 to 1954. It was most popular in 1922 with 43 babies given the name.
In the later years of this period, Madlyn has become less common than it once was.
| Year | Count |
|---|---|
| 1913 | 6 |
| 1915 | 29 |
| 1916 | 9 |
| 1917 | 7 |
| 1918 | 13 |
| 1919 | 23 |
| 1920 | 10 |
| 1921 | 23 |
| 1922 | 43 |
| 1923 | 29 |
| 1924 | 14 |
| 1925 | 23 |
| 1926 | 23 |
| 1927 | 19 |
| 1928 | 11 |
| 1929 | 20 |
| 1930 | 5 |
| 1931 | 8 |
| 1935 | 7 |
| 1937 | 5 |
| 1938 | 5 |
| 1940 | 6 |
| 1944 | 6 |
| 1945 | 7 |
| 1947 | 11 |
| 1948 | 6 |
| 1950 | 6 |
| 1954 | 10 |