| Canada. Correctional Service Canada, Peterborough Parole Office, Parole Services, Peterborough Parole Office | Peterborough |
| Canada. Veterans Affairs Canada, Peterborough District Office | Peterborough |
| Canadian Baptists of Ontario and Quebec, Lakefield Baptist Church | Lakefield |
| Canadian Continence Foundation (The), Mailing Address | Peterborough |
| Canadian Family Health Counselling, Peterborough | Peterborough |
| Canadian Hearing Services, Communication Devices and Interpreting Services | Toronto |
| Canadian Hearing Services, Connect Mental Health Counselling | Toronto |
| Canadian Hearing Services, Hearing Care Counselling Program | Toronto |
| Canadian Hearing Services, Mailing Address, Ontario Employment Assistance Services, Peterborough | |
| Canadian Mental Health Association Haliburton, Kawartha, Pine Ridge, Peterborough - George St N, Dual Diagnosis Program | Peterborough |
| Canadian Mental Health Association Haliburton, Kawartha, Pine Ridge, Peterborough - George St N, Supportive Housing | Peterborough |
| Canadian Mental Health Association Haliburton, Kawartha, Pine Ridge, Peterborough Office, Peterborough - George St N | Peterborough |
| Canopy Support Services, Peterborough, Adult Protective Services | Peterborough |
| Canopy Support Services, Peterborough, Autism Services | Peterborough |
| Canopy Support Services, Peterborough, Behavioural Consultation Services | Peterborough |
| Canopy Support Services, Peterborough, Fetal Alcohol Spectrum (FASD) | Peterborough |
| Capacity Assessment & Risk Evaluation for Seniors, Shauna MacEachern Occupational Therapy PC | Lindsay |
| Capitol Taxi | Peterborough |
| CarePartners, Peterborough Branch, CarePartners, Peterborough Branch | Peterborough |
| Cathedral Court | Peterborough |
| Cavan Monaghan. Municipal Office, Bruce Johnston Branch, Cavan Monaghan Library | Cavan Monaghan |
| Cavan Monaghan. Municipal Office | Millbrook |
| Cavan Monaghan. Municipal Office, Milbrook Branch, Cavan Monaghan Library | Millbrook |
| CBI Home Health, Peterborough | Peterborough |
| CCRC, Peterborough - George St N, Housing Resource Centre | Peterborough |
| CCRC, Peterborough - George St N, Professional Counselling Program and Employee Assistance Programs | Peterborough |
| Cephas Christian Reformed Church, Cephas Church | Peterborough |
| Charlotte Pantry | Peterborough |
| Chartwell Jackson Creek Retirement Residence | Peterborough |
| Chemung Lake District Lions Club | Selwyn Township |
| Closing the Gap Healthcare, Lindsay, Rehabilitation Services - Lindsay Location | Kawartha Lakes |
| Coach Canada, Coach Canada - Administration | Peterborough |
| Coach Canada, Megabus | Peterborough |
| College of Chiropodists of Ontario | Toronto Downtown Central |
| College of Physicians and Surgeons of Ontario | Toronto Downtown |
| ComForCare Home Care Peterborough | Peterborough |
| Comfort Keepers Peterborough | Peterborough |
| Community Care Peterborough, Apsley Office | Apsley |
| Community Care Peterborough, Buckhorn Office | North Kawartha |
| Community Care Peterborough, Chemung Office | Selwyn Township |
| Community Care Peterborough, Havelock Office | Havelock-Belmont-Methuen |
| Community Care Peterborough, Lakefield Office | Selwyn Township |
| Community Care Peterborough, Millbrook Office | Cavan Monaghan |
| Community Care Peterborough, Norwood Office | Havelock-Belmont-Methuen |
| Community Care Peterborough, Peterborough Office, Administration | Peterborough |
| Community Care Peterborough, Peterborough Office, Caremobile | Peterborough |
| Community Care Peterborough, Peterborough Office | Peterborough |
| Community Care Peterborough, Peterborough Office, Foot Care Clinic | Peterborough |
| Community Care Peterborough, Peterborough Office, Home at Last | Peterborough |
| Community Futures Peterborough | Peterborough |
| Community Living Trent Highlands, Haliburton - Victoria St, Family Support | Haliburton |
| Community Living Trent Highlands, Lindsay - McLaughlin Rd, Family Support | Kawartha Lakes |
| Community Living Trent Highlands, Lindsay - McLaughlin Rd, Respite NOW | Lindsay |
| Community Living Trent Highlands, Peterborough - Aylmer St, Family Support | Peterborough |
| Community Paramedic Programs, Peterborough Community Paramedic Program, Peterborough, Peterborough Community Paramedic Program | Peterborough |
| Continuum Care Inc, No Physical Location | Peterborough |
| Curve Lake First Nation, Cultural Centre | Selwyn Township |
| Curve Lake First Nation, Curve Lake Health Centre - WshkiiGomaang MnoBmaadziwin Gamig | Selwyn Township |
