Maryland has the highest median income for adults with some college or an associate degree. Sean Pavone/Getty Images The rising costs of higher education are prompting some people to reconsider four-year degrees. Higher educational attainment is associated with higher earnings across all 50 US states. Adults with some college or an associate degree earn the most in Maryland, with a median of $55,301. The cost of higher education across the US continues to rise, and for many Americans, the deci