| 5 | Cain's Cakery | Retailers - other | South Oxfordshire | OX39 |
| 5 | Cakes And Toppers | Other catering premises | Oxford City | OX3 |
| 5 | Cakes by Casey | Other catering premises | South Oxfordshire | OX39 |
| 5 | Cakes of Curiosity | Other catering premises | South Oxfordshire | OX39 |
| 5 | Capers Bistro - EF International Language School | School/college/university | Oxford City | OX3 0DT |
| 5 | Caprinos Pizza | Takeaway/sandwich shop | Oxford City | OX3 8DH |
| 5 | Carole Thurston Catering | Other catering premises | South Oxfordshire | OX39 |
| 5 | Caterplus At St Lukes Hospital And Cafe | Hospitals/Childcare/Caring Premises | Oxford City | OX3 7PF |
| 5 | Cedar Hollow @ The Oaks | Other catering premises | South Oxfordshire | OX3 8TA |
| Awaiting | Chaa Affaire | Restaurant/Cafe/Canteen | Oxford City | OX3 9AW |
| 5 | Chak de Samosa | Other catering premises | South Oxfordshire | OX39 |
| 5 | Cheney School | School/college/university | Oxford City | OX3 7QH |
| 5 | Cherry Tree Nursery | Hospitals/Childcare/Caring Premises | Oxford City | OX3 8LL |
| 5 | Cherwell Competition Centre Clubhouse | Other catering premises | South Oxfordshire | OX3 0QG |
| 4 | Chilworth House Lower School | School/college/university | South Oxfordshire | OX33 1JP |
| 5 | Chilworth House Upper School | School/college/university | South Oxfordshire | OX33 1JP |
| 5 | Chinnor & Princes Risborough Railway | Restaurant/Cafe/Canteen | South Oxfordshire | OX39 4ER |
| 5 | Chinnor Bakery & Cafe | Retailers - other | South Oxfordshire | OX39 4PG |
| 5 | Chinnor Community Pavilion | Other catering premises | South Oxfordshire | OX39 4PU |
| Exempt | Chinnor Post Office | Retailers - other | South Oxfordshire | OX39 4PF |
| 5 | Chinnor Village Centre | Restaurant/Cafe/Canteen | South Oxfordshire | OX39 4DH |
| 5 | Chopstix at Welcome Break Oxford Services | Restaurant/Cafe/Canteen | South Oxfordshire | OX33 1LJ |
| 5 | Churchill Hospital - Ward Kitchens | Hospitals/Childcare/Caring Premises | Oxford City | OX3 7JY |
| 5 | Claddagh | Hotel/bed & breakfast/guest house | Oxford City | OX3 7DX |
| 2 | Coco Noir | Restaurant/Cafe/Canteen | Oxford City | OX3 9AA |
| 5 | Collinwood Road - Lunch Club | Other catering premises | Oxford City | OX3 8HW |
| 5 | Community Emergency Foodbank | Hospitals/Childcare/Caring Premises | Oxford City | OX3 7JF |
| 5 | Compass Group UK Ltd At The Cafe | Restaurant/Cafe/Canteen | Oxford City | OX3 7DQ |
| 5 | Compass Group UK Ltd At The Cafe | Restaurant/Cafe/Canteen | Oxford City | OX3 7BN |
| 5 | Compass Group UK Ltd At Tulip Cafe | Restaurant/Cafe/Canteen | Oxford City | OX3 7LF |
| 5 | Cool Kids Club | Hospitals/Childcare/Caring Premises | South Oxfordshire | OX33 1NN |
| 5 | Coral House | Hospitals/Childcare/Caring Premises | Oxford City | OX3 |
| 4 | Cornfield Bakery | Restaurant/Cafe/Canteen | South Oxfordshire | OX33 1XP |
| 5 | Costa | Restaurant/Cafe/Canteen | Oxford City | OX3 7JG |
| 5 | Costa Coffee | Restaurant/Cafe/Canteen | Oxford City | OX3 9AX |
| 5 | Costcutter And Post Office | Retailers - other | Oxford City | OX3 0JR |
| 5 | Cotswold House | Hospitals/Childcare/Caring Premises | Oxford City | OX3 7JX |
| 5 | Courtside @ Bury Knowles Park | Restaurant/Cafe/Canteen | Oxford City | OX3 9ED |
| 5 | Craft Burger | Restaurant/Cafe/Canteen | Oxford City | OX3 7BL |
| 5 | Cranston Pickles | Other catering premises | South Oxfordshire | OX33 |
| 4 | Cricks Butchers | Retailers - other | South Oxfordshire | OX33 1XP |
| Awaiting | Delish Foods CANCELLED REGISTRATION | Manufacturers/packers | Oxford City | OX3 |
| 5 | Dolce Education Catering | School/college/university | Oxford City | OX3 8NH |
| 5 | Dolce Education Catering St Josephs Catholic Primary School | School/college/university | Oxford City | OX3 7SX |
| 5 | Dolce at Beckley CoE Primary School | School/college/university | South Oxfordshire | OX3 9UT |
| 4 | Dolce at Horspath C of E Primary School | School/college/university | South Oxfordshire | OX33 1RY |
| 5 | Domino's Pizza | Takeaway/sandwich shop | Oxford City | OX3 9ED |
| 3 | Duo Chef's | Restaurant/Cafe/Canteen | South Oxfordshire | OX39 4PF |
| 5 | Durban Spice | Other catering premises | South Oxfordshire | OX33 |
| 5 | EDWARDS & WARD LTD (Edwards & Ward at John Watson School) | School/college/university | South Oxfordshire | OX33 1NN |