--- title: "Sarnia–Port Huron border crossing codes: CBSA 0440, US port 3802 · Adhoc" description: "The Sarnia–Port Huron border crossing: CBSA office code 0440 on the Canadian side, US port of exit code 3802 on the US side." canonical: "https://www.adhocs.ca/border-crossings/sarnia-port-huron" last_updated: 2026-07-27 --- # Sarnia–Port Huron crossing codes Border crossing At Sarnia the CBSA office code is 0440. If the goods left the United States through Port Huron, Michigan, the US port code is 3802. - **Canada · CBSA office:** [0440](https://www.adhocs.ca/cbsa-offices/0440) Sarnia - **United States · US port of exit:** [3802](https://www.adhocs.ca/us-ports-of-exit/3802) Port Huron, Michigan - **Province:** [Ontario](https://www.adhocs.ca/cbsa-offices/ontario) ## Warehouses at 0440 3 active warehouse codes report to the Canadian side. Goods can wait in one until CBSA releases them. - [2918](https://www.adhocs.ca/cbsa-warehouses/2918) Canadian National Railways, Track Sarnia (0440) - [2919](https://www.adhocs.ca/cbsa-warehouses/2919) Cargill Limited, 101 Exmouth st Sarnia N7T 5M2 (0440) - [5877](https://www.adhocs.ca/cbsa-warehouses/5877) Shell Canada Products, 150 St-Clair Parkway Corunna N0N 1G0 (0440) ## Nearby crossings - [Sombra–Algonac, about 30 km](https://www.adhocs.ca/border-crossings/sombra-algonac): [0465](https://www.adhocs.ca/cbsa-offices/0465) Sombra ⇄ [3814](https://www.adhocs.ca/us-ports-of-exit/3814) Algonac, Michigan - [Windsor–Detroit, about 90 km](https://www.adhocs.ca/border-crossings/windsor-detroit): [0453](https://www.adhocs.ca/cbsa-offices/0453) Windsor - Ambassador Bridge, [0452](https://www.adhocs.ca/cbsa-offices/0452) Windsor Tunnel ⇄ [3801](https://www.adhocs.ca/us-ports-of-exit/3801) Detroit, Michigan - [Niagara–Buffalo, about 285 km](https://www.adhocs.ca/border-crossings/niagara-buffalo): [0410](https://www.adhocs.ca/cbsa-offices/0410) Fort Erie Commercial, [0427](https://www.adhocs.ca/cbsa-offices/0427) Niagara Falls ⇄ [0901](https://www.adhocs.ca/us-ports-of-exit/0901) Buffalo-Niagara Falls, New York ## Good to know - **Which US port.** CBSA defines it as the US port where the truck or train crosses into Canada, or the one nearest to where it crosses. For goods sent by ship or plane, it is the US port where they were loaded. Also in this directory: [CBSA offices](https://www.adhocs.ca/cbsa-offices) · [Warehouse codes](https://www.adhocs.ca/cbsa-warehouses) · [US ports of exit](https://www.adhocs.ca/us-ports-of-exit) ## Questions ### What is the CBSA office code for Sarnia? 0440, on the Canadian side of the Sarnia–Port Huron crossing. ### What is the US port code for Port Huron, Michigan? 3802, on the US side of the Sarnia–Port Huron crossing. ## Sources - [Directory of CBSA offices and services](https://www.cbsa-asfc.gc.ca/do-rb/menu-eng.html), Canada Border Services Agency - [Ports of entry](https://www.cbp.gov/contact/ports), U.S. Customs and Border Protection - [Memorandum D17-1-10, Coding of Customs Accounting Documents](https://www.cbsa-asfc.gc.ca/publications/dm-md/d17/d17-1-10-eng.html), Canada Border Services Agency - [Sub-location codes for customs sufferance warehouses](https://www.cbsa-asfc.gc.ca/import/codes/sw-ea-eng.html), Canada Border Services Agency, version of July 27, 2026 Which US port faces which CBSA office is matched by location; neither agency publishes it as a list. Adhoc is not affiliated with CBSA or CBP.