St. Johnsbury (CDP), Vermont
St. Johnsbury is a census-designated place (CDP) corresponding to the main settled areas in the town of St. Johnsbury, Caledonia County, Vermont, United States. As of the 2020 census it had a population of 5,994, out of 7,364 in the entire town. The CDP is in eastern Caledonia County, occupying the southern one-third of the town of St. Johnsbury. It includes the urban center of St. Johnsbury, the village of St. Johnsbury Center to the north up the valley of the Passumpsic River, and development along Route 2 to the east up the valley  of the Moose River, but not as far as the village of East St. Johnsbury. Interstate 91 passes through the west side of the CDP, with access from Exits 20, 21, and 22. I-91 leads north to Newport and south to White River. U.S. Routes 2 and 5 intersect in the center of the community. U.S. 2 leads west to Montpelier, the state capital, and east to Lancaster, New Hampshire, while U.S. 5 provides a local parallel route to I-91, leading north to Lyndonville and south to Wells River.