- 1 Hardy Machine Co.
- 2 Hardy Patent Pick Co.
- 1 Hare, George Emlen, 1808-1892
- 1 Haredale, Emma (Fictitious character)
- 1 Haredale, Geoffrey (Fictitious character)
- 1 Harlan, Bill
- 1 Harley & Brenner (Knitting machinery)
- 3 Harley, John Pritt, 1786-1858
- 1 Harmen Gerritsz. van Rijn., c. 1568-1630.
- 8 Harmensz, Rembrandt. van Rijn.
- 3 Harmonicas
- 2 Harmonists
- 3 Harmony
- 1 Harmony, Pennsylvania
- 4 Harness, William, 1790-1869
- 4 Harnesses
- 1 Harper & Bros.
- 4 Harper & Brothers
- 1 Harpers Ferry National Historical Park, West Virginia
- 2 Harpers Ferry, West Virginia
- 3 Harper's Fork Factory
- 1 Harpers Hollow Park
- 1 Harper's Shovel Manufactory
- 11 Harper's weekly
- 74 Harps
- 2 Harpsichords
- 1 Harris Bottling
- 3 Harris Manufacturing Co.
- 2 Harris, R.S. Iron Proof Manufacturing
- 5 Harris, Samuel L.
- 6 Harris, Thomas, architect.
- 1 Harris, William (manure)
- 2 Harrisburg Car Manufacturing Co.
- 1 Harrisburg, Pennsylvania
- 7 Harrisburg, Pennsylvania
- 4 Harrison Boiler Works
- 1 Harrison Bros. & Co.
- 1 Harrison Bros. & Co. Gray's Ferry Chemical Works
- 1 Harrison Building
- 1 Harrison Dye Works
