| 5 | Howson Care Centre Ltd | Hospitals/Childcare/Caring Premises | West Lindsey | DN21 5JU |
| 5 | Hung Wang | Takeaway/sandwich shop | West Lindsey | DN21 1HS |
| 5 | Hydrink Limited | Retailers - other | West Lindsey | DN21 3TL |
| 5 | I Learn Education Caistor | Hospitals/Childcare/Caring Premises | West Lindsey | LN7 6NJ |
| Awaiting | Iconic Foods | Mobile caterer | West Lindsey | DN21 |
| 4 | Ideal Catering Ltd at Whites Wood Academy | School/college/university | West Lindsey | DN21 |
| 5 | Il Gusto Restaurant & Lounge | Restaurant/Cafe/Canteen | West Lindsey | DN21 2HP |
| Exempt | Illuminate Care Group | School/college/university | West Lindsey | DN21 3AA |
| 5 | Impact Food Group | School/college/university | West Lindsey | DN21 2ST |
| 5 | Indian Curry Pot | Takeaway/sandwich shop | West Lindsey | LN8 |
| Exempt | Ingham Primary School | School/college/university | West Lindsey | LN1 2XT |
| 4 | Ingham Village Minimarket | Retailers - other | West Lindsey | LN1 2XT |
| 4 | Ingleby Arms | Restaurant/Cafe/Canteen | West Lindsey | DN21 5AH |
| 5 | Inn On The Green | Pub/bar/nightclub | West Lindsey | LN1 2XT |
| 5 | It's My Jam | Other catering premises | West Lindsey | LN1 |
| 4 | JJJ Catering | Mobile caterer | West Lindsey | LN1 |
| 5 | Jacks in a Box | Other catering premises | West Lindsey | LN8 |
| 1 | Jelleyfish | Retailers - other | West Lindsey | DN41 |
| 5 | John Coupland Hospital | Hospitals/Childcare/Caring Premises | West Lindsey | DN21 2TJ |
| 5 | Johnson's Traditional Fish and Chips | Takeaway/sandwich shop | West Lindsey | DN21 2DL |
| 5 | Jordon Bakes Cakes | Other catering premises | West Lindsey | LN8 |
| 5 | Just Begin | Other catering premises | West Lindsey | LN2 |
| 5 | K & A's Shop and Sandwich Bar | Takeaway/sandwich shop | West Lindsey | DN21 5AN |
| 5 | K B Jones | Other catering premises | West Lindsey | DN21 |
| 5 | KFC | Restaurant/Cafe/Canteen | West Lindsey | DN21 2EZ |
| 5 | Kandy Hero | Retailers - other | West Lindsey | DN21 2DD |
| 5 | Kath's Kitchen | Other catering premises | West Lindsey | LN3 |
| 5 | Katies Cakes and Bakes | Other catering premises | West Lindsey | DN21 |
| 4 | Kays Kitchens | Mobile caterer | West Lindsey | DN21 |
| 5 | Keelby Luncheon Club | Other catering premises | West Lindsey | DN41 8EE |
| Exempt | Keelby Sports Association | Other catering premises | West Lindsey | DN41 8DH |
| 1 | Keelby Village Store Ltd | Retailers - other | West Lindsey | DN41 8EA |
| 3 | Keelby fish and chips pizza burger | Takeaway/sandwich shop | West Lindsey | DN41 8EH |
| 5 | Ken Briggs Ltd | Retailers - other | West Lindsey | LN8 3ER |
| Exempt | Kettlethorpe Village Hall | Other catering premises | West Lindsey | LN1 2GZ |
| 5 | Kids Hangout @ Parish | School/college/university | West Lindsey | DN21 2LN |
| 5 | Kids Hub Soft Play | Restaurant/Cafe/Canteen | West Lindsey | LN2 2SL |
| 5 | Kingsway Clayton House Residential Care Home | Hospitals/Childcare/Caring Premises | West Lindsey | DN21 1LW |
| 5 | Kingswood Education Catering Ltd at Caistor Yarborough Academy | School/college/university | West Lindsey | LN7 6QZ |
| 4 | Kisimul Group Ltd, Acacia Hall | Hospitals/Childcare/Caring Premises | West Lindsey | LN3 5AL |
| 5 | Kisimul Group Ltd, Faldingworth | Hospitals/Childcare/Caring Premises | West Lindsey | LN8 3SF |
| 5 | Kisimul Group Ltd, Gainsborough | Hospitals/Childcare/Caring Premises | West Lindsey | DN21 1HQ |
| 5 | Kisimul Group, Rand | Hospitals/Childcare/Caring Premises | West Lindsey | LN8 5NJ |
| Exempt | Knaith Village Hall | Other catering premises | West Lindsey | DN21 5ET |
| 5 | Kruger Meats | Retailers - other | West Lindsey | DN21 |
| 5 | LARC Rise | Hospitals/Childcare/Caring Premises | West Lindsey | LN2 2NR |
| 5 | LCC Gainsborough Market Arcade Childrens Centre and Family Hub | Hospitals/Childcare/Caring Premises | West Lindsey | DN21 2DY |
| 5 | LCC- Caistor Children's Centre | Hospitals/Childcare/Caring Premises | West Lindsey | LN7 6TJ |
| 5 | LCC- Cherry Willingham Childrens Centre | Hospitals/Childcare/Caring Premises | West Lindsey | LN3 4BD |
| 5 | LCC- Gainsborough North Marsh Road Childrens Centre | School/college/university | West Lindsey | DN21 2RR |