Xavier's School for Gifted Youngsters

X-Mansion
The Xavier Institute for Higher Learning
Notable locations	Salem Center, New York
Notable characters	X-Men Xavier Institute's Students & Faculties
First appearance	The X-Men #1 (Sept. 1963)
Publisher	Marvel Comics

The X-Mansion is the common name for a fictional mansion appearing in American comic books published by Marvel Comics. The mansion is depicted as the private estate of Professor X, a character in X-Men comics. It is the base of operations and training site of the X-Men and the location of a school for mutant teenagers, and sometimes older aged mutants, the Xavier Institute for Higher Learning, formerly Xavier's School for Gifted Youngsters. The X-Mansion is also the worldwide headquarters of the X-Corporation.

The X-Mansion's address is 1407 Graymalkin Lane, Salem Center (part of the town of North Salem), located in the very northeast corner of Westchester County, New York. The school's motto is "mutatis mutandis." In a recent edition of the comic, Wolverine re-opened the school, at the same address, under the name of the Jean Grey School for Higher Learning. After it was discovered that Terrigen had become toxic to mutants, Storm had the mansion moved to Limbo and renamed it X-Haven to keep mutants safe from the Terrigen until a cure could be discovered. After Medusa destroys the Terrigen so the mutants could survive Kitty Pryde moves the mansion from Limbo to Central Park, New York and renames it The Xavier Institute for Mutant Education and Outreach.

The X-Mansion is the inherited property of Charles Xavier (Professor X) and has been in the Xavier family for ten generations including two known mutants in the lineage, both becoming detached from the family. Little else is known about them or their mutations.