San Diego

===International trade===
[[File:Cruise Ships Visit Port of San Diego 005 (cropped).jpg|thumb|right|The [[Port of San Diego]] is the third-busiest port in [[California]].]]
San Diego's commercial port and its location on the [[United States–Mexico border]] make international trade an important factor in the city's economy. The city is authorized by the United States government to operate as a [[Foreign trade zones of the United States|Foreign Trade Zone]].<ref>{{cite web |url=http://www.sandiego.gov/economic-development/sandiego/trade/tradezone.shtml |title=City of San Diego:Foreign Trade Zone |access-date=April 28, 2011 |archive-date=May 2, 2011 |archive-url=https://web.archive.org/web/20110502060753/http://www.sandiego.gov/economic-development/sandiego/trade/tradezone.shtml |url-status=dead }}</ref>

The city shares a {{convert|15|mi|km|adj=on}} border with Mexico that includes two border crossings. San Diego hosts the busiest international border crossing in the world, in the San Ysidro neighborhood at the [[San Ysidro Land Port of Entry Expansion Project|San Ysidro Port of Entry]].<ref>{{cite news |title=Number of border crossings stabilizes |url=http://www.signonsandiego.com/news/2010/jul/11/number-of-border-crossings-stabilizes/ |newspaper=San Diego Union-Tribune |date=July 11, 2010 |access-date=April 28, 2011}}</ref> A second, primarily commercial border crossing operates in the [[Otay Mesa, San Diego|Otay Mesa]] area; it is the largest commercial crossing on the California–[[Baja California]] border and handles the third-highest volume of trucks and dollar value of trade among all United States-Mexico land crossings.<ref>{{cite web |url=http://sandiegohealth.org/sandag/publicationid_853_1782.pdf |title=SANDAG: Otay Mesa Port of Entry Southbound Truck Route Improvements |publisher=sandiegohealth.org |access-date=April 28, 2011}}</ref>
[[File:San Ysidro Border Traffic (8653120372) (cropped).jpg|thumb|left|[[San Ysidro Port of Entry]] is the [[Border checkpoint#Busiest checkpoints in the world|4th-busiest border crossing in the world]].]]
The [[Port of San Diego]] is the third-busiest port in California and one of the busiest on the [[West Coast of the United States|West Coast]]. One of the Port of San Diego's two [[cargo]] facilities is located in [[Downtown San Diego]] at the Tenth Avenue Marine Terminal. This terminal has facilities for [[Shipping container|containers]], [[bulk cargo]], and [[refrigerated]] and frozen storage, so that it can handle the import and export of many commodities.<ref>{{cite web |url=http://www.portofsandiego.org/maritime/tenth-avenue-terminal.html |title=Port of San Diego:10th Avenue Marine Terminal |access-date=April 28, 2011 |archive-url=https://web.archive.org/web/20110505013601/http://www.portofsandiego.org/maritime/tenth-avenue-terminal.html |archive-date=May 5, 2011 }}</ref> In 2009 the Port of San Diego handled 1,137,054 short tons of total trade; foreign trade accounted for 956,637 short tons while domestic trade amounted to 180,417 short tons.<ref>{{cite news |title=National ranking of California ports by cargo volume |url=http://www.sddt.com/news/article.cfm?SourceCode=20110321czc |newspaper=San Diego Daily Transcript |date=March 21, 2011 |access-date=April 28, 2011}}</ref>

Historically tuna fishing and canning was one of San Diego's major industries,<ref>{{cite web|url=http://www.sandiegohistory.org/tuna|title=Tuna! Celebrating San Diego's Famous Fishing Industry|work=San Diego History Center|access-date=September 1, 2012}}</ref> although the American tuna fishing fleet is no longer based in San Diego. Seafood company [[Bumble Bee Foods]] is headquartered in San Diego, as was [[Chicken of the Sea]] until 2018.<ref>{{cite news |title=Bumble Bee may buzz downtown: The tuna company considers high-profile move from Kearny Mesa |author=Roger Showley |url=http://m.utsandiego.com/news/2013/jan/29/bumblebee-downtown-headquarters/ |newspaper=San Diego Union Tribune |date=January 29, 2013 |access-date=February 3, 2013 |archive-date=July 24, 2013 |archive-url=https://web.archive.org/web/20130724070322/http://m.utsandiego.com/news/2013/jan/29/bumblebee-downtown-headquarters/ }}</ref><ref>{{cite news |title=Chicken of the Sea Moves North American HQ from S.D. to El Segundo |url=https://www.sdbj.com/news/2018/may/03/chicken-sea-moves-north-american-hq-sd-el-segundo/ |newspaper=San Diego Business Journal |date=May 3, 2018 |access-date=September 7, 2021}}</ref>