Authors - Lanz Anjelo Conanan, James Ernest Geraldo, Wilson M. Tan Abstract - With the increasing push for digital transformation and egovernance in order to improve service delivery capacity and crisis handling, some Philippine Local Government Units (LGU) have begun to develop their own Digital Identity Systems (DIS) as the foundation of their digital infrastructure. Due to the recognition of LGUs’ constraints in developing their own DIS and the interoperability opportunities with the Philippine Identification System (PhilSys), the mature National DIS of the Philippines, this paper developed OpenLGU ID, a customizable and open source LGU DIS which integrates with PhilSys. Its architecture implements a variety of recognized LGUs needs such as ID issuance, service claiming, and sector group management. It is designed with standards like Digital Public Goods (DPG) in mind given it’s minimal storage of Personally Identifiable Information (PII) and it’s signing of QRs. Ultimately, the researchers present an open source system ready to be implemented by LGUs to assist them in their digital transformation.