Guide to Online Bingo.riverside casino wa CASINO MTL SLOT Nevada became the first state to legalize casino gambling, but not before it was reluctantly the last western state to outlaw gaming in At midnight, October First, , a strict anti - gambling law became effective in Nevada. Despite inheriting the pastime of gambling from the British colonists, by the start of the 20th Century most forms of gambling in the United States were illegal, following decades of anti - gambling protests and legislation. However, Nevada was reborn in the s as an answer to The Great Depression. Nevada is the meca of gambling in the US. Find out where to play online poker, which laws apply to you and a historical timeline of gambling events. First up below you’ll find some of the key moments in history for gambling activity in Nevada.