Ionia is a very rare variant of Iona that was most common in the 1920s and has all but disappeared.
Ionia is a girl name. It last appears in U.S. records in 2007. Ionia first appears in 1893 and peaked in 1923 (18 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2007 | 5 | 5 | #18,698 |
| 1962 | 6 | — | #6,141 |
| 1961 | 7 | — | #5,509 |
| 1947 | 5 | — | #5,643 |
| 1946 | 6 | — | #4,657 |
| 1944 | 5 | — | #4,848 |
| 1942 | 6 | — | #4,323 |
| 1939 | 7 | — | #3,586 |
| 1937 | 7 | — | #3,590 |
| 1936 | 5 | — | #4,487 |
| 1935 | 7 | — | #3,559 |
| 1934 | 13 | — | #2,353 |
| 1933 | 10 | — | #2,765 |
| 1932 | 9 | — | #3,156 |
| 1930 | 8 | — | #3,485 |
| 1929 | 9 | — | #3,246 |
| 1928 | 8 | — | #3,584 |
| 1927 | 6 | — | #4,529 |
| 1926 | 12 | — | #2,787 |
| 1924 | 10 | — | #3,246 |
| 1923 | 18 | — | #2,124 |
| 1922 | 8 | — | #3,817 |
| 1921 | 7 | — | #4,215 |
| 1920 | 6 | — | #4,634 |
| 1919 | 7 | — | #4,023 |
| 1918 | 11 | — | #2,904 |
| 1917 | 10 | — | #2,970 |
| 1916 | 11 | — | #2,734 |
| 1915 | 7 | — | #3,601 |
| 1913 | 5 | — | #3,418 |
| 1912 | 6 | — | #2,784 |
| 1911 | 5 | — | #2,651 |
| 1910 | 5 | — | #2,579 |
| 1907 | 5 | — | #2,203 |
| 1905 | 5 | — | #2,074 |
| 1899 | 5 | — | #1,716 |
| 1897 | 5 | — | #1,652 |
| 1896 | 5 | — | #1,692 |
| 1893 | 5 | — | #1,527 |