Knox Presbyterian Church is a member of Falls Church Community Service Council. The purpose of the FCS organization is to provide needed human services to poor and disadvantaged individuals and families in the Falls Church community. The assistance primarily is for short-term and emergency needs with the overall mission of helping individuals and families achieve self sufficiency, an improved quality of life and avoid homelessness. FCS is a group of local churches that supports:
- an emergency food pantry,
- Meals on Wheels,
- a furniture donation program, and
- a financial help program.