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Eureka is a fictional town in Oregon. For most of the first three seasons it was not revealed what state in the U.S. Pacific Northwest Eureka is located (the real Pacific Northwest city of Eureka, California, is ruled out), leaving Oregon and Washington as possibilities. Clues to the city's location are shown in flags and other references, but it is not confirmed until the episode "What goes around comes around" (season 2, episode 18) when Jack receives an airline ticket from Eureka, Oregon to Australia.Most of the series is shot in British Columbia, but some city hall scenes were shot in Ashland, Oregon.
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