 The ZIP Code is 95017 and the community is inside area code 831.The community has numerous small residences and two big occupants – Big Creek Lumber Company and the Swanton Pacific Ranch campus of California Polytechnic State University.Swanton is home to Swanton Pacific Railroad, a one-third-scale small-gauge railroad that runs on of track through the Scott Creek valley using locomotives and cars from the San Francisco Panama Pacific Exposition of 1915.