Cannabis in Nevada became legal for recreational use effective January 1, 2017, having been legalized by ballot initiative in 2016. Medical marijuana use was legalized by ballot initiative in 2000, and has been available to licensed individuals in the state since shortly after that date. Nevada also licenses growers and distributors, and citizens of Nevada are banned from growing their own cannabis unless they live more than 25 miles from a licensed dispensary.
Nevada first banned cannabis in 1923, during a nationwide trend of states limiting the drug between 1911-1933. 
Nevada voters approved Question 9 – the Nevada Medical Marijuana Act – in 1998, with 59% of the vote.  It was approved again in 2000, with 65% of the vote.  Because the initiative was a constitutional amendment, it required approval in consecutive elections in order to become law. 
In 2002 "Question 9" went before the voters with a proposal to legalize and regulate recreational cannabis, but was soundly defeated at the polls.  Legalized cannabis appeared on the ballot again in 2006 as the Nevada Regulation of Marijuana Initiative, receiving 44% of the vote. 
The Regulation of Marijuana Initiative, or Question 7 in Nevada, is an act voted on in the 2006 United States general election by registered Nevada state citizens. It unsuccessfully sought to amend the Nevada Revised Statutes (NRS) to allow for up to one ounce of marijuana to be purchased by individuals 21 years of age or older in a regulated, controlled, and state- taxed system.
The ballot measure was defeated, 56% against and 44% for. 
The initiative sought to amend NRS by inserting several sections legally defining terms such as "marijuana", "paraphernalia", and others, protect adults over the age of 21 from arrest or jail time for possession of up to one ounce of marijuana, maintain current underage marijuana penalties, and increase penalties for operating a motor vehicle under the influence of any illegal substance, amongst a slew of other provisions. It would have gone into effect on November 26, 2006 if it had passed.[ citation needed]
Question 2 was a 2016 Nevada voter initiative to legalize cannabis. The official title was "Initiative to Regulate and Tax Marijuana".  The measure, which appeared on the November 8, 2016 ballot, sought to legalize possession of up to one ounce of cannabis for adults over the age of 21.   The initiative did not include provisions for regulation beyond taxation, such as licensing retailers. 
On July 1, 2017 Nevada dispensaries began the sale of recreational marijuana.  The new law means anyone over the age of 21 that has a valid photo ID may purchase recreational marijuana in the state of Nevada.
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- Question 2 Passed in Nevada. Now what?, Henderson, Nevada: Connor & Connor PLLC, November 11, 2016
- Colton Lochhead (November 9, 2016), "What you should know about Nevada's new marijuana law", Las Vegas Review-Journal