Lotteries are games of chance in which a prize is awarded to those who purchase tickets. Prizes can range from small cash amounts to goods or services such as vacations or automobiles. Most lotteries are run by state or provincial governments, though some are operated by private companies. Some lotteries are not regulated by the government, and may not be legal in all jurisdictions. Those lotteries that are regulated by the government usually provide a percentage of their profits to charity.

The history of the lottery is complicated, and there are many different types of lotteries. Some are based on chance, while others require skill, knowledge of the game or rules, or both. In the United States, a major source of lottery revenue is the sale of instant scratch-off tickets. These tickets can be bought at convenience stores and gas stations, where the winnings are collected by an employee of the store or station. In the past, the winnings of some lottery games were used to fund public schools.

During the early 19th century, some states passed laws allowing for private lotteries. These were based on the idea that the winners would receive goods or services rather than cash prizes. Many of these were based on the Edo period Japanese game keno. In the US, these private lotteries are not as common as they once were.

In Canada, there are four nationwide lotteries, operated by the Interprovincial Lottery Corporation (a consortium of the five provincial/territorial lottery commissions): Atlantic Lottery Corporation (New Brunswick, Newfoundland and Labrador, Prince Edward Island), Ontario Lottery and Gaming Corporation (Ontario), Loto-Quebec (Quebec), and Western Canada Lottery Corporation (Manitoba, Saskatchewan, Manitoba, Yukon, Northwest Territories). There is also a health lottery in Australia that is run by Tatts Group under a Government licence in each State or Territory.