The baby name Dian appears in baby name data for the United States from 1932 to 1982. It was most popular in 1946 with 237 babies given the name.
In the later years of this period, Dian has become less common than it once was.
| Year | Count |
|---|---|
| 1932 | 32 |
| 1933 | 15 |
| 1935 | 11 |
| 1937 | 14 |
| 1938 | 16 |
| 1939 | 63 |
| 1940 | 68 |
| 1941 | 115 |
| 1942 | 117 |
| 1943 | 158 |
| 1944 | 89 |
| 1945 | 145 |
| 1946 | 237 |
| 1947 | 205 |
| 1948 | 155 |
| 1949 | 138 |
| 1950 | 145 |
| 1951 | 173 |
| 1952 | 93 |
| 1953 | 161 |
| 1954 | 121 |
| 1955 | 87 |
| 1956 | 103 |
| 1957 | 88 |
| 1958 | 75 |
| 1959 | 89 |
| 1960 | 48 |
| 1961 | 36 |
| 1962 | 24 |
| 1963 | 5 |
| 1964 | 10 |
| 1965 | 5 |
| 1966 | 5 |
| 1967 | 5 |
| 1972 | 6 |
| 1982 | 5 |