Although Canada has been self-governing since 1867, it wasn’t until this date in 1927 that the U.S. established formal diplomatic relations through recognition of a Canadian ambassador in Washington. Until that date, the Dominion of Canada’s foreign relations remained under the control of London. The relations since have been sterling, as Canada is our greatest trading partner. In 2014, more than $660 billion of goods passed one way or the other across the effectively undefended border. There are about 6.8 million foreign-born residents out of Canada’s population of nearly 36 million. America’s population of nearly 319 million includes over 42 million foreign-born residents, with about 806,000 from Canada.Profile America is in its19th year as a public service of the U.S. Census Bureau.