The baby name Ennis appears in baby name data for the United States from 1910 to 1997. It was most popular in 1930 with 50 babies given the name.
In the later years of this period, Ennis has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 10 |
| 1912 | 9 |
| 1913 | 21 |
| 1914 | 26 |
| 1915 | 29 |
| 1916 | 25 |
| 1917 | 5 |
| 1917 | 17 |
| 1918 | 5 |
| 1918 | 41 |
| 1919 | 35 |
| 1920 | 48 |
| 1921 | 29 |
| 1922 | 47 |
| 1923 | 37 |
| 1924 | 8 |
| 1925 | 20 |
| 1925 | 43 |
| 1926 | 39 |
| 1927 | 18 |
| 1928 | 28 |
| 1929 | 34 |
| 1930 | 50 |
| 1931 | 30 |
| 1932 | 5 |
| 1934 | 31 |
| 1936 | 10 |
| 1938 | 10 |
| 1939 | 32 |
| 1940 | 14 |
| 1941 | 12 |
| 1942 | 28 |
| 1943 | 15 |
| 1944 | 21 |
| 1945 | 12 |
| 1946 | 32 |
| 1947 | 15 |
| 1948 | 6 |
| 1949 | 8 |
| 1950 | 5 |
| 1951 | 6 |
| 1953 | 15 |
| 1954 | 18 |
| 1955 | 33 |
| 1956 | 6 |
| 1957 | 16 |
| 1959 | 12 |
| 1960 | 26 |
| 1963 | 18 |
| 1964 | 10 |
| 1965 | 18 |
| 1966 | 14 |
| 1967 | 10 |
| 1969 | 5 |
| 1970 | 7 |
| 1972 | 5 |
| 1977 | 5 |
| 1981 | 7 |
| 1987 | 5 |
| 1997 | 17 |