 Port Ludlow, the community, is located on the eastern edge of Jefferson County at , on the northwest side of Port Ludlow, the waterbody, located at .The original settlement of Port Ludlow is in the northern part of the CDP, with new development reaching south of the Port Ludlow inlet.The CDP also includes the communities of Mats Mats (to the north), Swansonville (to the northwest), and Beaver Valley (on the western edge).