This organization is the national economics honorary society. Students can be considered for membership once they have achieved the following:
- Taken at least four courses in Economics, including two Introductory Economics courses (101 and one course from those numbered 201-239), and the two Intermediate Theory courses (243 and 245).
- Achieved a grade point average of 3.2 or above in the major, and 3.1 or above overall.
Omicron Delta Epsilon (ODE) and the economics department jointly sponsor numerous lectures by visiting economists during the academic year; ODE also implements frequent informal roundtable discussions on contemporary economic issues. In addition, select ODE members from Gettysburg participate in undergraduate economics conferences where students present their own papers to their peers from other colleges.