Hollo | |
|---|---|
  Hollo Location of Hollo in Pennsylvania  Hollo Hollo (the United States) | |
| Coordinates: 40°43′22″N 75°17′44″W / 40.72278°N 75.29556°W | |
| Country |  United States |
| State |  Pennsylvania |
| County | Northampton |
| Township | Lower Macungie Lower Nazareth Township |
| Population (2000) | |
| • Metro | 865,310 (US: 68th) |
| Time zone | UTC-5 (Eastern (EST)) |
| • Summer (DST) | UTC-4 (EDT) |
| ZIP Codes | 18045, 18064 |
| Area code(s) | 610 |
| GNIS feature ID | 1203827[1] |
Hollo (also Hallo, Niesky, or Nisky) is an unincorporated community in Northampton County, Pennsylvania, United States. It is part of the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census.