The baby name Junius appears in baby name data for the United States from 1910 to 1991. It was most popular in 1920 with 163 babies given the name.
In the later years of this period, Junius has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 33 |
| 1911 | 16 |
| 1912 | 62 |
| 1913 | 65 |
| 1914 | 83 |
| 1915 | 113 |
| 1916 | 148 |
| 1917 | 116 |
| 1918 | 118 |
| 1919 | 121 |
| 1920 | 163 |
| 1921 | 114 |
| 1922 | 129 |
| 1923 | 126 |
| 1924 | 120 |
| 1925 | 155 |
| 1926 | 145 |
| 1927 | 104 |
| 1928 | 113 |
| 1929 | 108 |
| 1930 | 83 |
| 1931 | 80 |
| 1932 | 65 |
| 1933 | 58 |
| 1934 | 78 |
| 1935 | 46 |
| 1936 | 46 |
| 1937 | 43 |
| 1938 | 37 |
| 1939 | 59 |
| 1940 | 40 |
| 1941 | 27 |
| 1942 | 67 |
| 1943 | 67 |
| 1944 | 43 |
| 1945 | 30 |
| 1946 | 42 |
| 1947 | 50 |
| 1948 | 28 |
| 1949 | 44 |
| 1950 | 67 |
| 1951 | 36 |
| 1952 | 20 |
| 1953 | 37 |
| 1954 | 28 |
| 1955 | 40 |
| 1956 | 23 |
| 1957 | 27 |
| 1958 | 21 |
| 1959 | 17 |
| 1960 | 6 |
| 1961 | 21 |
| 1962 | 5 |
| 1963 | 21 |
| 1964 | 11 |
| 1965 | 19 |
| 1966 | 10 |
| 1967 | 7 |
| 1968 | 8 |
| 1969 | 6 |
| 1970 | 5 |
| 1972 | 19 |
| 1974 | 10 |
| 1975 | 6 |
| 1976 | 5 |
| 1977 | 6 |
| 1980 | 10 |
| 1991 | 15 |