List of Canada–United States border crossings
This article includes lists of border crossings, ordered from west to east (north to south for Alaska crossings), along the International Boundary between Canada and the United States. Each port of entry (POE) in the tables below links to an article about that crossing. On the U.S. side, each crossing has a three-letter Port of Entry code. This code is also seen on passport entry stamp or parole stamp. The list of codes is administered by the Department of State. Note that one code may correspond to multiple crossings. Land ports of  entry. Port of entry hours of service for road crossings, except where noted, are open year-round during the day. Unstaffed road crossings. This is a list of roads that cross the U.S.-Canada border that do not have border inspection services, but where travelers are legally allowed to cross the border in one or both directions. In prior years, there were dozens of such roads where one could legally cross the border and then proceed to an open Customs office to report for inspection, but most have since been barricaded or demolished. Requirements for reporting to CBSA or CBP for  inspection are noted. Ferry crossings. This list is of point-to-point international ferry services, including those for road vehicles, passengers and rail. Other marine ports of entry are not included. Closed land ports of entry. This list includes only those crossings known to have had customs or immigration services at the border, but are now inactive. They are listed in order from west to east. Roads that are unattended, but otherwise still functioning are listed under the Unstaffed Road Crossings section. Many former points of entry along the Custom and Border Protections Swanton Sector were barricaded/closed in the  1970s in securing the 1976 Montreal Summer Olympics.<ref name="UNITED DIVIDE: A LINEAR PORTRAIT OF THE USA/CANADA BORDER CHAPTER 3: THE 45TH PARALLEL"></ref> These included counties in upstate New York (Clinton, Essex, Franklin, St. Lawrence, and Herkimer), and New Hampshire (Coos, Grafton, and Caroll), as well as many small uncontrolled crossings in western Vermont, including Henry Rd, Alburgh, less than away from Montreal.