Located near the edge of Federation space in 2263, the base housed millions of people from all Federation worlds. It was built with the idea of not showing favoritism to any single Federation world, by being built in deep space, instead of on a planet. (TOS movie: Star Trek Beyond)
Technical data Edit
The base consisted of a large transparent globe with its own internal atmosphere, and a number of pylons that held buildings, parks, squares, a public transporter network, and support facilities. The station had a large spacedock capable of easily holding ships as large as Constitution-class vessels. The base along with it's defensive satellite network, were armed with phasers and photon torpedo launchers. However, they unable to stop Krall's swarm ships from their attempt to break through.
Yorktown Station also contained a shipyard capable of building vessels, including Constitution-class ships. One such vessel was the USS Enterprise-A, which was launched in 2263, following the destruction of the previous USS Enterprise. (TOS movie: Star Trek Beyond)