Pot is about to be legal in Massachusetts and Nevada, and a California measure to allow recreational use was leading, according to projections from NBC News.
They were three of five states with legalization measures for recreational use on Tuesday's ballot, while proposals addressing medical marijuana were voted on in Arkansas, Florida, Montana and North Dakota.
If all the proposals are victorious, about 75 million people, or over 23 percent of the U.S. population, will live in states where recreational pot use is allowed, according to Reuters.
In Massachusetts, the regulation applies to the use, distribution and cultivation of marijuana for residents who are at least 21 years old.
Voters in Nevada approved the recreational use of an ounce or less of marijuana, with the same age restrictions as Massachusetts. Nevada previously passed medical marijuana legislation.
California residents voted on the right to use pot on a recreational basis.
With 43 percent of precincts counted, the measure was leading by 56 to 45 percent, according to NBC News.