| NASA Outstanding Service Medal | |
| Presenter: | the National Aeronautics and Space Administration |
| Country: | United States |
| Type: | Medal |
| Eligibility: | Government employees |
| Status: | Obsolete |
| Total Awarded: | None known |
| Higher: | Outstanding Leadership Medal |
| Same: | Exceptional Achievement Medal Exceptional Service Medal |
| Lower: | Exceptional Scientific Achievement Medal Exceptional Engineering Achievement Medal Exceptional Technology Achievement Medal Exceptional Administrative Achievement Medal Equal Employment Opportunity Medal |
The NASA Outstanding Service Medal, now obsolete,[1] was to be awarded to US government employees only for notably outstanding service which affected technical or administrative programs of NASA.