The baby name Ilona appears in baby name data for the United States from 1917 to 2016. It was most popular in 1950 with 73 babies given the name.
In the later years of this period, Ilona has become less common than it once was.
| Year | Count |
|---|---|
| 1917 | 5 |
| 1940 | 26 |
| 1941 | 31 |
| 1942 | 48 |
| 1943 | 51 |
| 1944 | 28 |
| 1945 | 35 |
| 1946 | 67 |
| 1947 | 69 |
| 1948 | 29 |
| 1949 | 65 |
| 1950 | 73 |
| 1951 | 63 |
| 1952 | 54 |
| 1953 | 43 |
| 1954 | 34 |
| 1955 | 32 |
| 1956 | 17 |
| 1957 | 29 |
| 1958 | 25 |
| 1959 | 19 |
| 1960 | 12 |
| 1961 | 24 |
| 1962 | 18 |
| 1963 | 11 |
| 1964 | 8 |
| 1965 | 22 |
| 1967 | 28 |
| 1968 | 5 |
| 1969 | 7 |
| 1970 | 6 |
| 1971 | 7 |
| 1973 | 5 |
| 1974 | 5 |
| 1984 | 5 |
| 1986 | 5 |
| 1988 | 6 |
| 1997 | 6 |
| 1998 | 5 |
| 2005 | 7 |
| 2007 | 6 |
| 2008 | 5 |
| 2009 | 5 |
| 2015 | 5 |
| 2016 | 5 |