York Space Systems is an American aerospace company specializing in small and medium class spacecraft based in Denver, CO.

York Space Systems is currently entering the production phase of their S-Class platform, which leverages a proprietary design to reduce the cost of spacecraft manufacture by an order of magnitude. The S-Class platform is a 3-axis stabilized spacecraft capable of supporting 90 kg payloads with up to 100 W of Orbit Average Power (OAP), 1,400 W Peak and 3,000 W Enhanced.

Designed for mass manufacture and intended for constellations, the S-Class supports a wide range of missions including Earth Observation and communication; and is capable of steady-state operation in any orbit inclination and orientation without redesign. The platform form factor can leverage existing share ride opportunities on ESPAs, or can be adapted to any of the numerous dedicated small launch vehicles currently under development to reduce launch segment costs.