| Merrimack Valley | |
|---|---|
 | |
| Long-axis direction | Northwest–southeast |
| Geology | |
| Type | River |
| Geography | |
| Location |  Massachusetts New Hampshire |
| Population centers |
|
| Borders on | White Mountains Plum Island, Massachusetts Atlantic Ocean |
| Traversed by | Interstate 93, Interstate 495, Haverhill Line (MBTA) |
| Rivers | Merrimack River |
The Merrimack Valley is a bi-state region along the Merrimack River in the U.S. states of New Hampshire and Massachusetts. The Merrimack is one of the larger waterways in New England and has helped to define the livelihood and culture of those living along it for millennia.
Major cities in the Merrimack Valley include Concord, Manchester, and Nashua in New Hampshire, and Lowell, Lawrence, and Haverhill in Massachusetts. The Valley was a major center of the textile industry in the 19th century.