Santa Claus is a town in Spencer County, Indiana, United States, in the southwestern part of the state. Home to numerous Christmas-themed attractions including Santa’s Candy Castle, Santa Claus Museum, Holiday World & Splashin’ Safari (originally called Santa Claus Land), Frosty’s Fun Center, Christmas Lake Golf Course, and Santa’s Stables, Santa Claus is located in Carter, Clay and Harrison Townships, it sits between Interstate 64 and the Ohio River and Owensboro.
The town has the world’s only post office to bear the name of the eponymous Christmas figure. Because of this popular name, the post office receives thousands of letters to Santa from all over the world each year. A group of volunteers known as Santa’s Elves ensures each child receives a reply from Santa Claus; this tradition has been in existence since at least 1914.
Every year, the post office also creates a special Christmas hand-cancellation pictorial postmark for use during December, which also attracts mail from all over the world.
According to en.wikipedia.org. Source of photos: internet