DRES stands for;

DRES Division of Real Estate Services (various locations)
DRES Dotation Régionale d’Équipement Scolaire (French: Regional Allocation of School Equipment)
DRES Defence Research Establishment Suffield

DRES Deep River Elementary School (Connecticut)
DRES Disability Related Employment Supports (Canada)
DRES Dietary Risk Evaluation System (EPA)
DRES Disability Resource and Educational Services
DRES Dynamic Range Encoding Scheme
DRES Disaster Response Evaluate