The below list is compiled from Google searches in some of the county’s largest towns. It is not exhaustive, and you can use providers outside of this list:

BarstopMarket Place, Hitchin, SG5 1DS0800 458
Grupo Bimbo UK Ltd83 Bridge Rd, Welwyn Garden City, AL7 1LA02085
BeboHatfield, Welwyn and HertfordPer
Bite Around the WorldVarious locations07955
eatlunch5 Sutherland Ct, Welwyn Garden City, AL7 1BJ01707
Saracens HeadBridge Foot, Ware, SG12 9BS01920
Campania Food LtdSuite 306, Mill Studio Business Centre, Ware, SG12 9PY01920
Lobster Pot Catering8 Cowpers Way, Twein, Welwyn, AL6 0NX01438
Main IngredientUnit 12 Redbourn Road, Hemel Hempstead, HP2 7ES02080
Country Fare Catering16 Drury Lane, Hunsdown, Ware, SG12 8NU01279
James Zimmer Catering421 Centennial Park, Elstree, Borehamwood, WD6 3TN02088
Ruby's Indian Takeaway5 Newtown Road, Bishop's Stortford, CM23 3SA01279
Bannerman's Catering Service155 St Albans Road, Watford, WD24 5BD07773
Belle Event Catering52 Lodge Lane, Waltham Abbey, EN9 3AD07833
Big Buffets18 Wedgwood Gate, Stevenage, SG1 4SU01438
Cacao Catering & Events17 Leeming Road, Borehamwood, WD6 4EB02037
Cantina CarnitasUnit 4, Parsons Green Trading Estate, Stevenage, SG1 4QG01462
Papa PaellaVarious locations07957
Golden Platter15 Howard Drive, Borehamwood, WD6 2NY02039
HansonsBRE Business Park, 28 Bucknalls Lane, Watford, WD25 9XX01923
Hasta Barista23 Wavell Close, Chesunt, Waltham Cross, EN8 0LA07793
Loft23b George Street, St Albans, AL3 4ES01727
Millstream CateringUnit 2D Old Hal Farm Yard, Priory Lane, Little Wymondley, Hitchin SG4 7BL01438
Misya Mese & Grill123 High Street, Stevenage, SG1 3HS01438
No. 7 Catering7 High Street, Welwyn, AL6 9EE01438
PircioMarket Square, Bishop's Stortford, CM23 3UU01279
Skew4 Adderley Road, Bishop's Stortford, CM23 3AE01279
Sweetness CateringHemel Once, Boundary Way, Hemel Hempstead, HP2 7YU01442
Taste Buds106 Bancroft, Hitchin, SG5 1NB01462
The Cornish Pantry16 Queensway, Stevenage, SG1 1BS01438
Trini Caribbean Catering52 Lodge Lane, Waltham Abbey, EN9 3AD02035
The Kebabery5 Station Road, Bishop's Stortford, CM23 3BJ01279
Kamals CateringUnit 10, 29 Wilbury Way, Hitchin, SG4 0TW07859
Cool Cooks Catering Company LtdHertford Rugby Club, 62 Hoe Lane, Ware, SG12 9NZ07765
Soho Gourmet Group LimitedUnit 9 Stoney Lane, Chipperfield, Hertfordshire, WD4 9LS07917
Buffet Galore1 Hill View, Whitwell, Hitchin, SG4 8AX07707
Bridge the Gap3 Southmill Road, Bishop's Stortford, CM23 3DH01279
MJT Catering269 Gammons Lane, Watford, WD24 5JP01923
Home-Style Caterers1 Little Ley, Welwyn Garden City, AL7 4TN01707
El Bar de Tapas5 Middle Row, Stevenage, SG1 3AN01438
Buzz CateringDunmow Road, Bishop's Stortford, CM23 5RG01279
Martin Mathew & Co Ltd50 St Andrew Street, Hertford, SG14 1JA01992
Meadowcroft Food ServiceFen End, Stotfold, Hitchin, SG5 4BA01462
MTPS Catering & Bar Supplies38 Raynham Road, Bishop's Stortford, CM23 5PE01279
Salvo 1968 LtdMaxwells West, Great Cambridge Road, Cheshunt, Waltham Cross, EN8 8XH08081
Bridge The Gap CateringVarious
Thought 4 Food25 Greenhill Cres, Watford, WD18 8XU07980
Herts Independent Living
The King's MeadHertford Road, Ware, SG12 9LE01920
COOK32 North Street, Bishop's Stortford, CM23 2LW01279 501484
Gourmet Oriental88 South Street, Bishop's Stortford, CM23 3BG01279 505799
Eat 1723 Potter Street, Bishop's Stortford, CM23 3UH01279 652121
Cibo34 South Street, Bishop's Stortford, CM23 3AZ01279 653068
Gourmeturk30 High Street, Bishop's Stortford, CM23 2LX01279 655555
Shadona69 South Street, Bishop's Stortford, CM23 3AL01279 656320
Old Town Chinese Restaurant118-120 High Street, Stevenage, SG1 3DW01438 313600
SubwayUnit 1, 29 Town Square, Stevenage, SG1 1BP01438 315637
SodexoSolar House, Kings Way, Stevenage, SG1 2UA 01438 341400
Bedwell Pizza & KebabThe Poacher, 129 Bedwell Cresent, SG1 1NA01438 360355
Alternative CateringParsons Green Trading Estate, Boulton Road, Stevenage, SG1 4QX01438 487099
Big Fat Greek MezeParsons Green Trading Estate, Boulton Road, Stevenage, SG1 4QX01438 487099
Rittys Place6 Baker Street, Stevenage, SG1 3AL01438 723739
Bingol Kebab & Pizza97A High Street, Old Town, Stevenage, SG1 3HR01438 741039
Confetti Event CateringMark Road, Hemel Hempstead Industrial Estate, HP2 7DN01442 214474
ObriensThe Marlowes Shopping Centre, Marlowes, Hemel Hempstead, HP1 1DX01442 216666
Nite Owls32 Hetchleys, Gadebridge, Hemel Hempstead, HP1 3NX01442 248867
Food Innovation Centre509 London Road, Hemel Hempstead, HP3 9BQ01442 260496
Montague's Catering Partnership Ltd43 Ninian Road, Hemel Hempstead, HP2 6NA01442 392291
WG Titmuss & SonsAlmshoebury Farm, Hitchin, SG4 7NT01462 434593
BBS Food Imports LtdSopers Road, cuffley, Potters Bar, EN6 4RY01707 877822
Peace of Mind Catering70 Villiers Cres, St Albans, AL4 9HZ01727 223087
The Smokehouse Deli205 Cell Barnes Lane, St Albans, AL1 5PX01727 251040
Fusions Catering Company LtdUnit 23, Hertfordshire Business Centre, Alexander Road, St Albans, AL2 1JG01727 826007
Nothing Too Small34 Catham Close, St Albans, AL1 5QT01727 834919
The Mexican13-15 West Street, Ware, SG12 9EE01920 449559
Super Kebab and Chicken28 Amwell End, Ware, SG12 9HW01920 460200
Amwell Tandori14 High Street, Ware, SG12 9BX01920 462026
Casa Lua64 High Street, Ware, SG12 9DA01920 463554
Wok U Like94 High Street, Ware, SG12 9AP01920 465723
Punch House7 West Street, Ware, SG12 9EE01920 467675
Chefs Table Events25 The Green, Ware, SG12 0QW01920 468333
Jacoby'sChurchgate House, 13-15 West Street, Ware, SG12 9EE01920 469181
ManolyaTudor Square, Ware, SG12 9XF01920 486688
Stanley Ho & Company10 Ridge Lane, Watford, WD17 4TD01923 255965
LRG CateringWatford, WD24 5DT01923 448358
HamiltonsUnit 12 Wenta Business Centre, Colne Way, Watford, WD24 7ND01923 492288
Handmaid Catering6 Frankland Close, Croxley Green, Rickmansworth, WD3 3AR01923 775049
Accent Catering Services LtdSchool House, Quendon Drive, Waltham Abbey, EN9 1LG01992 717320
Eat Me Events & CateringCroxdale Road, Borehamwood, WD6 4QA02037 720810
MR Food Design2 Sutton Path, Borehamwood, WD6 1UH02082 058033
Steins Foods LtdCranborne House, Potters Bar, EN6 3JN02089 001000
The London Catering CompanySmall-Acre Nursery, Crouch Lane, Goff's Oak, Waltham Cross, EN7 6TL07949 056058
Food Fest UK12 Honeycroft Drive, St Albans, AL4 0GE08450 944049
Your Private Chef94 The Campions, Borehamwood, WD6 5QF07963 550534
UBP Catering897 Honeypot Lane, Stanmore, HA7 1AR07867 517693
The Italian ChefHyde Farm, Hyde Lane, Hemel Hempstead, HP3 8SA07761 478107
Sweetnest Catering HospitalityCafe Imex, Maxted Road, Hemel Hempstead, HP2 7DX07760 557228
Taylor Kingsley Catering1A Water Lane, Hitchin, SG5 1TX07773 177729
Cardona & Son159 Hitchin Road, Farifield Park, Stotfold, Hitchin, SG5 4JH07958 655962
Elegance CateringBessemer Drive, Stevenage, SG1 2XU07548 777674
Poonam's Kitchen7 Gun Lane, Knebworth, SG3 6BH07907 635039
The Village Kitchen35 Lower Paddock Road, Oxhey, Watford, WD29 4DU07818 028048
UBP Catering897 Honeypot Lane, Stanmore, HA7 1AR07867 517693
Joseph CateringUnit 40 Wenta Business Centre, Watford, WD24 7ND07977 514054
Anna's Kitchen34 Townfield, Rickmansworth, WD3 7DD07813 590549
Gatta's PlattersDane House, 55 London Road, St Albans, AL1 1LJ07725 262260
Albertos CateringNew House Park, St Albans, AL1 1UJ07867 126204
Richard Mcfarland Catering30 Hamilton Close Bricket Wood, St Albans, AL2 3NA07941 048414
Countess Party Catering in Essex & Herts165 Millwards, Hatfield, AL10 8UU07545 788465
M&H Fast FoodWelham Green, Hatfield, AL9 7HN07424 944272
We Can Cook Catering Services9 Drycroft, Welwyn Garden City, AL7 4DH07504 043940
Sauce Catering UKShallcorss Cres, Hatfield, AL10 9QH07789 715631
3 Valleys Chefs19 New Road, Digswell, Welwyn, AL6 0AE07590 495529
Cleves Catering WareThe Maltings, Stanstead Abbotts, Ware, SG12 8HG07444 471735