The baby name Irby appears in baby name data for the United States from 1915 to 1955. It was most popular in 1924 with 31 babies given the name.
In the later years of this period, Irby has become less common than it once was.
| Year | Count |
|---|---|
| 1915 | 17 |
| 1916 | 20 |
| 1917 | 14 |
| 1918 | 25 |
| 1919 | 10 |
| 1920 | 10 |
| 1921 | 5 |
| 1922 | 11 |
| 1924 | 31 |
| 1926 | 26 |
| 1928 | 14 |
| 1929 | 6 |
| 1930 | 7 |
| 1931 | 12 |
| 1932 | 12 |
| 1933 | 8 |
| 1937 | 10 |
| 1939 | 6 |
| 1942 | 7 |
| 1948 | 5 |
| 1953 | 6 |
| 1955 | 21 |