The World Scrabble Championship (WSC) is the most-prestigious title in competitive English-language Scrabble. It was held every second year after 1991 until 2013 when it began to be held annually. Although the official brand name and organizations of the event have changed over recent years, many Scrabble enthusiasts from more than 30 countries compete to become World Scrabble Champion. The reigning World Scrabble Champion is David Eldar, who won the title at the MSI World Championships in Nottingham, England in 2017.

The number of players competing in the tournament has risen steadily over time, from 48 in 1991 to 108 in 2009. Each country is allocated seats for the championship, and individual countries' national associations determine which of their players represent them. This is typically done by means of a national rating system or qualifier tournaments. A good performance by a national team according to specific criteria will earn further permanent places for that country.

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