| I. B. Knickerbocker | |
| State Senate: | Washington |
| District: | 30th |
| Term Start: | January 14, 1907 |
| Term End: | January 9, 1911 |
| Preceded: | Dr. John James Smith |
| Succeeded: | B. A. Bowen |
| Birth Date: | June 1864 |
| Birth Place: | Cincinnatus, New York, U.S. |
| Death Place: | Seattle, Washington, U.S. |
| Party: | Republican |
Irving B. Knickerbocker (June 1864 - April 19, 1954) was an American politician in the state of Washington. He served Washington State Senate from 1907 to 1911.[1]