A spaceport is a site for launching spacecraft, by analogy with airport for aircraft. Typically the site is large enough that should a rocket explode it will not endanger human lives or adjacent launch pads.

It is believed that future hypersonic aircraft will require a very long runway rather than a vertical launch pad. Such hypothetical spaceports will present unique challenges in noise abatement, zoning, and passenger access, with as much as a 5 mile wide corridor surrounding a 30 mile long runway. A dedicated mass transit system from the nearest public access point to the aircraft boarding area will be required.

Some of the main spaceports are: