Origins and popularity in the USA
"Euchered"; lithograph (1884) from the Library of Congress
It seems euchre was brought into the United States by the early German settlers of Pennsylvania, and from that region disseminated throughout the nation. The 1864 American Hoyle disputes its alleged German heritage, tracing its origin to Pennsylvania in the 1820s. It goes on to surmise that a "rich German farmer's daughter" had visited Philadelphia and carried home a confused memory of Ecarté which then developed into Euchre.
Another hypothesis is that the game derives from an eighteenth-century Alsatian card game named Juckerspiel, a derivative of Triomphe. Also, it may have been introduced by immigrants from Cornwall, UK, where it remains a popular game. It is also played in the neighbouring county of Devon; one theory is that it was introduced by French or American prisoners of war imprisoned in Dartmoor Prison during the early 19th century. Ombre is an ancestral form of Euchre.
The game was regarded as the national card game of the US in the late 19th century but has declined in popularity although it retains a strong following in some regions like the Midwest.
The game retains its popularity in Canada, particularly Ontario and is commonly seen as a drinking game with tournaments often held by bars and community centres.