| Henry B. Harshaw | |
| Order: | 10th |
| Office: | State Treasurer of Wisconsin |
| Term Start: | January 3, 1887 |
| Term End: | January 5, 1891 |
| Governor: | Jeremiah McLain Rusk William D. Hoard |
| Predecessor: | Edward C. McFetridge |
| Successor: | John Hunner |
| Party: | Republican |
| Birth Date: | June 14, 1842 |
| Birth Place: | Argyle, New York, U.S. |
| Death Place: | Milwaukee, Wisconsin, U.S. |
| Death Cause: | Tongue cancer |
| Restingplace: | Riverside Cemetery, |
| Profession: | lawyer |
| Allegiance: | United States |
| Branch: | United States Volunteers Union Army |
| Serviceyears: | 1861 - 1864 |
| Rank: | 2nd Lieutenant, USV |
| Unit: | 2nd Reg. Wis. Vol. Infantry |
| Battles: | American Civil War |
Henry Baldwin Harshaw (June 14, 1842December 25, 1900) was an American lawyer and Republican politician. He was the 10th State Treasurer of Wisconsin. He served in the famed Iron Brigade of the Army of the Potomac during the American Civil War and lost his left arm at the Battle of Chaffin's Farm. He is the namesake of Harshaw, Wisconsin.
Harshaw was born Henry Baldwin Harshaw on June 14, 1842, in Argyle, New York.[1] He moved to Oshkosh, Wisconsin in 1854.[2] Harshaw married Georgia M. Finney in 1864. During the American Civil War, he served with the 2nd Wisconsin Infantry Regiment. While serving, he would be severely wounded and ultimately lose his left arm. Harshaw died of tongue cancer in Milwaukee, Wisconsin on December 25, 1900. The community of Harshaw, Wisconsin, was named in his honor.[3]
Harshaw was Treasurer from 1887 to 1891. Additionally, he was the postmaster of the Oshkosh post office and a circuit court clerk. He was a Republican.