| Bonsoire Bridal & Prom | Bridal shop | The Stables, Holdenby House | Thu 10:00–17:30 |
| Brampton Halt | Pub | Pitsford Rd | Mon–Thu 09:30–23:00 |
| Briticom | Telecommunications equipment supplier | 7, Premier Court, 6 Boarden Cl | Mon–Fri 09:00–17:00 |
| British Heart Foundation - Home Store | Home furniture shop | 67-83 Bridge St | Mon–Sat 09:30–17:30 |
| Brixworth Country Park | Country park | Northampton Rd | Daily 06:00–22:00 |
| Brixworth Legal Limited | Lawyer | Catherine House, Harborough Rd | Mon 09:30–17:30 |
| Brixworth Library | Library | Spratton Rd | Mon–Fri 09:00–17:00 |
| Brooklyn Brownie Co - Northampton | Dessert shop | 9 Ixworth Cl | Tue–Sat 17:00–22:00 |
| Bubbles With Scent – Natural Handmade Skincare | Cosmetic products manufacturer | 112 High St | Thu 09:00–17:00 |
| Buck it up customs | Car stereo shop | 2 Sanders Dr | Tue–Fri 09:00–14:00 |
| Bugbrooke Post Office | Post office | 40 High St | Daily 08:00–21:00 |
| Burnetts Manufacturing Ltd | Plastic fabrication company | Barn Way | Mon–Fri 09:00–18:00 |
| Business Waste Management Limited | Waste collection service | 400 Pavilion Dr | Mon–Fri 08:00–18:00 |
| C J Rooney Electrical Services | Electrician | 10 Western Ave | Mon–Fri 08:00–17:00 |
| C.F.S. Brixworth Ltd | Powder coating service | The Old Brickworks, Harborough Rd | Mon–Fri 07:00–17:00 |
| Cafe 1850 Northampton | Cafe | Cathedral, Cafe 1850, Barrack Rd | Mon–Sat 10:00–15:00 |
| Cartel Brasserie & Grill | Fusion restaurant | 17 Cotton End | Mon–Sat 12:00–23:00 |
| Castle Ashby House | Tourist attraction | Castle Ashby, Northampton NN7 1LQ | Daily 10:00–16:00 |
| Castle Chauffeur & Executive Cars | Chauffeur service | 38 Castle Ave | Mon 09:00–17:00 |
| Castle Climate Control Ltd | HVAC contractor | 6e Clayfield Cl | Mon–Fri 09:00–17:00 |
| Catalogue Engineering Ltd | Civil engineering company | Bozenham Mill Ln | Fri 08:00–17:00 |
| Ceiling Works Ltd | Ceiling supplier | 2 Ace Ln | Mon 09:00–18:30 |
| Central Foods Limited | Catering supplier | Unit 2 Maple Ct, Ash Ln | Thu 08:30–17:00 |
| Charterhouse Clinic Northamptonshire | Addiction rehabilitation centre | The Avenue | Daily Open 24 hours |
| Chelsea Hire | Wedding service | Unit 1 Rothersthorpe Ave | Thu 08:00–16:00 |
| Cherry Tree Cakery | Bakery | 24 Cherry Tree Ln. | Sat–Sun 10:30–21:00 |
| Christ United Ministries International Liberty House | Pentecostal church | 254 Wellingborough Rd | Sun 09:00–13:00 |
| CNC Creations | Hardware shop | Ind Est, Sheaf Cl | Mon–Fri 09:00–17:00 |
| Community Law Service | Consumer advice centre | 49-53 Hazelwood Rd | Mon–Thu 10:00–14:00 |
| Complete Solar Installations | Solar energy system service | 30 High St | Daily 07:00–18:00 |