One Meralco Foundation (OMF) is the corporate foundation and social development arm of the Manila Electric Company (MERALCO), the largest electric utility company in the Philippines.

Formerly named Meralco Millennium Foundation, Inc., the foundation was re-launched as One Meralco Foundation, Inc. in 2011 and aligned its core advocacies to the corporate goals of the mother company.

OMF is a donee institution accredited by the Philippine Council of NGO Certification, a registered social welfare and development agency under the Department of Social Welfare and Development, and a member of the Philippine Business for Social Progress, Philippine Business for the Environment and the League of Corporate Foundations.