| Cambridge Thoracics by Giuseppe Aresu | Cardiovascular and thoracic surgeon | Biomedical Campus, Royal Papworth Hospital, Papworth Road | Fri Open 24 hours |
| Cambridge Tileworks | Tile contractor | Ivy Todd Farm, High St | Mon–Sat 08:00–18:00 |
| Cambridge Tourist Information & Tickets | Visitor centre | Market Hill | Mon–Tue 10:00–16:00 |
| Cambridge University Botanic Garden | Botanical garden | 1 Brookside | Daily 10:00–17:00 |
| Cambridge University Press & Assessment | Publisher | Shaftesbury Rd | Mon–Fri 09:00–17:00 |
| Cambridge Upholsterer | Upholstery shop | 46 Mill Rd | Tue 11:00–17:00 |
| Cambridgeshire & Peterborough NHS Foundation Trust | Association / organization | Elizabeth House | Mon–Fri 09:00–17:00 |
| Cambridgeshire Chamber of Commerce | Chamber of commerce | Clifford House, 2 Station Yard | Mon–Fri 09:00–17:00 |
| Cambridgeshire Local Wine School | Wine bar | c/o, Brew House, 1 King St | Fri 09:00–21:00 |
| Cambs Heating | HVAC contractor | 505 Coldhams Ln | Thu 08:00–16:30 |
| Cambs Home Design | Architectural designer | Greenhaze Ln | Mon–Fri 09:00–18:00 |
| Camclad Contractors Ltd | Roofing service | Unit 10 Stirling Way | Mon–Fri 08:30–17:00 |
| Cameo Early Intervention Services in Psychosis | Mental health services | Fulbourn Old drift, Ida Darwin | Mon–Thu 09:00–17:00 |
| Campkins Cameras | Camera shop | 12A King's Parade | Mon–Sat 10:00–17:00 |
| Camstone Contractors Ltd | Waterproofing service | 2 Trust Ct | Mon–Fri 07:00–20:30 |
| Carriages of Cambridge | Tea house | Bannold Supplies, Capability Barns, Huntingdon Rd | Tue–Sat 09:30–17:30 |
| Carrothers Orthopaedics | Orthopedic clinic | 30 New Rd | Mon–Fri 07:30–20:30 |
| CASO Design UK | Kitchenware shop | Unit 400, Buckingway Business Park | Mon–Fri 09:00–16:00 |
| CB Auto Tuning | Vehicle tuning service | Unit 4, new close farm | Mon–Thu 08:00–20:00 |
| CB Self Storage - Bar Hill | Self storage facility | Unit 1c, Gateway | Fri Open 24 hours |
| CB1 Computer Help | Computer service | 2 Cavendish Ct, Cavendish Rd | Fri 07:00–22:00 |
| CB3 Consulting Ltd | Quantity surveyor | St Johns Innovation Centre | Mon–Fri 08:00–18:00 |
| CBS Automotive | Auto electrical service | Grange Farm | Mon–Fri 08:30–17:00 |
| CBS Office Solutions | Office supplies shop | 1 Winship Rd | Mon–Fri 09:00–17:00 |
| CDC Studio | Architect | Studio, 17 Comberton Rd | Mon–Tue 09:00–17:30 |
| Chadwick Export Services | International trade consultant | 194 Station Rd | Mon–Fri 09:00–17:00 |
| Chameleon Windows Restoration | Window supplier | 3 Harness Cl | Fri 09:00–18:00 |
| Cherry Hinton Accounting Ltd | Chartered accountant | 73 Mill End Rd | Mon–Wed 09:00–15:00 |
| Cherry Hinton Barbers | Barber shop | Barbers, Mensroom, 98 High St | Mon–Fri 08:30–17:45 |
| Cherry Hinton Pharmacy & Travel Vaccination Clinic | Pharmacy | 39a High St | Mon–Fri 08:30–13:00, 14:00–18:00 |