Port Hadlock is a census-designated place (CDP) in Jefferson County, Washington, United States. The population was 3,476 at the 2000 census.
Samuel Hadlock, the founder of Port Hadlock, moved west in 1846. Finally landing in the Port Hadlock area in 1870. He contracted with the Washington Mill Company to build a sawmill on a spit of land off the Bay, on a low bank, but deep enough waters for tall ships to moor.Hadlock established a large lumber mill. Lumber from the mill was shipped to San Francisco, and as far away as Australia and Hawaii. Two of the remaining buildings of the Washington Mill Company are; the first one known today as the Northwest School of Wooden Boat Building. The second building was the residence of Samuel Hadlock, presently known as the Ajax Cafe.