| iX5 Pest Control | Pest control service | Ryehill Court, 16 Ryehill Ct | Daily 08:00–19:00 |
| Jata Connections LTD (Midlands) | Security system installation service | 66b, The Manor, The Causeway | Daily Open 24 hours |
| Jones Wholesale Business Store | Cash and carry wholesaler | Heathfield Way | Mon–Sat 09:00–17:00 |
| JSS Installations - Bathroom/kitchen/home improvements | Bathroom renovator | 17 Thorpe Rd | Mon–Fri 09:00–17:30 |
| Kevin Matthews Funeral Service - Northampton | Funeral director | 1-5 Balmoral Rd | Daily Open 24 hours |
| Kislingbury Sunnies and Spooks | Pick your own farm produce | Rothersthorpe Rd | Sat–Sun 10:00–16:00 |
| Kitchen and bathrooms fitter Northampton (Signature) | Bathroom renovator | 21 Reedhill | Daily Open 24 hours |
| L.D. Design And Build | Architecture firm | 12 Gregory St | Mon–Fri 07:00–19:00 |
| Lifestyle Builders | Home builder | 41 Church Way | Daily Open 24 hours |
| Long Buckby, United Reformed Church | Reformed church | Brington Rd | Mon 09:00–12:30 |
| Lucia Girardi Shoemaking and Millinery Workshops | Hat shop | Hilltop House, 5 Meadway | Daily 10:00–16:00 |
| M&S Foodhall | Ladies' clothes shop | 6 A45 | Mon–Sat 08:00–20:00 |
| M&S Simply Food | Convenience store | 211-219, Ring Rd, High St | Daily Open 24 hours |
| Madeira's Restaurant | Portuguese restaurant | 168 Birchfield Rd E | Tue–Thu 16:00–22:00 |
| MANNA FOOD CORNER. Indian-Kerala Kitchen | South Indian restaurant | sol central unit 2 | Daily 12:00–22:30 |
| Marquee Hire in Northampton | Tent rental service | 47 Liddington Way | Daily Open 24 hours |
| Marren Microwave Ltd | Microwave repair service | 40 Mallard Cl | Mon–Fri 08:30–17:00 |
| Marseille Restaurant | Modern French restaurant | 83 Sheep St | Tue–Fri 10:00–16:00, 18:00–23:00 |
| McHale Building Services | Excavating contractor | 26 Damson Dell | Daily 08:00–20:00 |
| Milton Malsor Village Hall | Village hall | 24 High St | Daily 08:00–23:59 |
| Motorvogue SEAT Northampton | Seat dealer | 74 Kingsthorpe Rd | Mon 08:30–18:00 |
| New Living Electrical Services Ltd | Electrical installation service | 10-12 Mill Ln | Daily 07:00–19:00 |
| NJM Locksmiths | Emergency Locksmiths Northampton | Locksmith | 4 Spruce Ct | Daily Open 24 hours |
| Northampton Cathedral of Our Lady Immaculate & St. Thomas of Canterbury Northampton | Catholic cathedral | Kingsthorpe Rd | Mon 08:30–19:30 |
| Northampton County Lawn Tennis Club | Tennis club | 54B Church Way | Daily 08:00–22:00 |
| Northampton Hip and Knee Clinic - Pierre Nasr, Consultant Orthopaedic Surgeon | Orthopaedic surgeon | Three Shires Hospital, Circle, The Avenue | Daily 08:00–21:00 |
| Northampton Transport | Removals company | 12 Clipston Way | Daily 07:00–23:30 |
| Northants Bouncy Castle Hire | Bouncy castle hire | 5 Brackley Cl | Daily 08:00–19:00 |
| Northants Groundwork Contractors | Landscaper | Manvell Farm, Kettering Road | Daily Open 24 hours |
| Northants Land Drainage Contractors Ltd | Drainage service | Althorpe Park Station | Daily Open 24 hours |