| Asa Fitch | |
| State: | New York |
| District: | 3rd |
| Term Start: | March 4, 1811 |
| Term End: | March 4, 1813 |
| Preceded: | Herman Knickerbocker |
| Succeeded: | Jonathan Fisk |
| Birth Date: | 10 November 1765 |
| Birth Place: | Groton, Connecticut Colony, British America |
| Death Place: | Salem, New York, U.S. |
Asa Fitch (November 10, 1765August 24, 1843) was a U.S. representative from New York from 1811 to 1813.
He was born in Groton in the Connecticut Colony. He studied medicine and became a physician practicing in Duanesburg and Salem, New York.
During the Revolutionary War he served as a sergeant in Captain Livingston's company. He was a justice of the peace from 1799 to 1810, was President of the Washington County Medical Society from 1806 to 1826, and was a County judge from 1810 to 1821.
He was elected as a Federalist to the Twelfth United States Congress, holding office from March 4, 1811, to March 3, 1813. He declined to be a candidate for renomination in 1812 and resumed the practice of medicine.
He died in Salem, New York, on August 24, 1843, and is interred in Evergreen Cemetery.