| Hanslope Village Hall | Events venue | Newport Rd | Daily 09:00–17:00 |
| Harmony Digestive and Liver Wellness Centre | Gastroenterologist | Avebury Blvd | Daily 12:00–20:00 |
| Hayley Down Nutrition | Nutritionist | Milton Keynes Business Centre | Mon–Wed 09:00–18:00 |
| Heat Lord - Central Heating Services | Central heating service | 20 Garston | Daily Open 24 hours |
| Hilton Car Supermarket | Used car dealer | Auckland Park | Mon–Sat 09:00–21:00 |
| HK Flavor | Cha chaan teng (Hong kong-style cafe) | 28 Church St | Wed–Thu 10:30–18:30 |
| Hodge Lea Meeting Place | Function room facility | Hodge Lea, Milton Keynes MK12 6JU | Mon–Thu 08:00–22:00 |
| Hoo Hing Ltd | Chinese supermarket | Unit 1, 3 Ward Rd | Mon 09:00–17:00 |
| Hot Tub Hire UK | Hot tub shop | Home Farm Ln | Daily 06:00–22:00 |
| Hotshots Sports Bar | Sports bar | Bond Ave | Daily 12:00–23:00 |
| HWY51 - Philly cheesesteaks | Restaurant | 16 Garrick Walk, N Twelfth St | Daily 09:30–03:30 |
| Imuli Takeaway & Events Catering | African restaurant | 7 Mount Ave | Daily 16:00–22:30 |
| Integral Plumbing and heating Ltd | Plumber | 11 Chardacre | Daily Open 24 hours |
| Istanbul Barber | Barber shop | 1 High St | Tue–Wed 09:00–18:00 |
| Istanbul Kebabs | Takeaway | 48 High St | Daily 14:00–00:00 |
| Jasmine Indian Cuisine | Modern Indian restaurant | Unit 24, Lloyds Court, 9 N 10th St | Daily 12:00–14:30, 17:30–23:00 |
| Joyes Chicken | Chicken shop | 3 Wadesmill Ln | Mon–Sat 11:00–23:00 |
| Just Beautie | Hair extensions supplier | 73 Queensway | Mon–Sat 09:00–17:30 |
| karunyasarees | Tienda de ropa | 9 Antonius Way | Daily Open 24 hours |
| Kents Hill Care Home | Nursing home | 50 Tunbridge Grove | Daily Open 24 hours |
| King Kebab | Mobile caterer | Bradwell Common Blvd | Mon 16:00–22:00 |
| Kingston Centre | Shopping centre | Winchester Cir | Mon–Fri 08:00–20:00 |
| KMDT Shenley - Krav Maga Defence Tactics | Self defence school | Dance Studio, SHENLEY LEISURE CENTRE, Burchard Cres | Sun 12:00–13:30 |
| Krown Construction | Property maintenance | Acorn House, 381 Midsummer Blvd | Daily 08:00–20:00 |
| Krust Pizza | Pizza takeaway | 9 High St | Mon–Thu 11:00–22:00 |
| La Vita Pazza | Food products supplier | 3b Chandos Pl | Daily Open 24 hours |
| Ladybirds Travel | Tour operator | 5 Mount Ave | Daily Open 24 hours |
| Lahori Vibes | Punjabi restaurant | 117 High St | Tue–Sun 15:00–23:00 |
| Lampwise Limited | Lighting shop | 63 High St | Mon–Sat 09:30–17:00 |
| Laser Quest Milton Keynes | Laser tag centre | Unit G2, Theatre District, 12 Garrick Walk | Sun 10:00–21:00 |