Around 90% of Americans celebrate Christmas. However, the specific percentage can vary slightly depending on the year and the source of the data. In general, Christmas is the most widely celebrated holiday in the United States, and it's observed by people of all backgrounds and faiths. The holiday is marked by the exchanging of gifts, spending time with family and friends, and participating in traditional customs like decorating a Christmas tree and singing carols. Many people also attend church services on Christmas Eve or Christmas Day to commemorate the birth of Jesus Christ.