| NASA Exceptional Service Medal | |
|---|---|
 NASA Exceptional Service Medal | |
| Type | Medal |
| Country | United States |
| Presented by | the National Aeronautics and Space Administration |
| Established | July 29, 1959 |
 NASA Exceptional Service Ribbon | |
| Precedence | |
| Next (higher) | NASA Outstanding Leadership Medal |
| Next (lower) | Exceptional Scientific Achievement Medal Exceptional Engineering Achievement Medal Exceptional Technology Achievement Medal Exceptional Administrative Achievement Medal Equal Employment Opportunity Medal |
The NASA Exceptional Service Medal is an award granted to U.S. government employees for significant sustained performance characterized by unusual initiative or creative ability that clearly demonstrates substantial improvement in engineering, aeronautics, space flight, administration, support, or space-related endeavors which contribute to NASA programs.
The medal was inherited by NASA from its predecessor organization, the National Advisory Committee on Aeronautics (NACA) and featured the NACA emblem. The original NASA version featured the NASA seal.