| A2B Bus & Coach (Royston) | 202 | 202 Ashwell Railway Station - Ashwell |
| Arriva (in Herts and Essex) | 758|Green Line | 758|Green Line London - Hemel Hempstead |
| Arriva (in Herts and Essex) | 10 | 10 Woodside - Holywell Estate (Circular) |
| Arriva (in Herts and Essex) | 9 | 9 Stevenage : Bus Station - Symonds Green / Poplars (Circular) |
| Arriva (in Herts and Essex) | 311 | 311 Bishops Stortford : Town Centre - Stortford Fields (Circular) |
| Arriva (in Herts and Essex) | 403 | 403 W G City, Great Ganett - Haldens (Circular) |
| Arriva (in Herts and Essex) | 302 | 302 Hemel Hempstead - Welwyn Garden City |
| Arriva (in Herts and Essex) | 331 | 331 Hertford - Buntingford |
| Arriva (in Herts and Essex) | 748|Green Line | 748|Green Line London - Woodhall Farm |
| Arriva (in Herts and Essex) | 401 | 401 Welwyn Garden City - Panshanger (Circular) |
| Arriva (in Herts and Essex) | 301 | 301 St Albans - Stevenage |
| Arriva (in Herts and Essex) | 500 | 500 Watford - Aylesbury |
| Arriva (in Herts and Essex) | 310 | 310 Waltham Cross - Hertford |
| Arriva (in Herts and Essex) | 40 | 40 Stevenage : Bus Station - Broadwater (Circular) |
| Arriva (in Herts and Essex) | 300 | 300 St Albans - Hemel Hempstead |
| Arriva (in Herts and Essex) | 1 | 1 Stevenage : Chells Manor / Poplars - Bus Station |
| Arriva (in Herts and Essex) | 357 | 357 Harpenden - Borehamwood |
| Arriva (in Herts and Essex) | 50 | 50 Stevenage : Bus Station - Broadwater (Circular) |
| Arriva (in Herts and Essex) | 856 | 856 John Henry Newman School - Six Hills Way |
| Arriva (in Herts and Essex) | 2 | 2 Hemel Hempstead : Bennetts End / Railway Stn - Woodhall Farm |
| Arriva (in Herts and Essex) | 7 | 7 Bus Station - Great Ashby (Circular) |
| Arriva (in Herts and Essex) | 4 | 4 Grovehill West - Hemel Hempstead Railway Station |
| Arriva (in Herts and Essex) | 510 | 510 Stansted Airport - Bishop's Stortford - Sawbridgeworth - Harlow |
| Arriva (in Herts and Essex) | 6 | 6 Bus Station - - Shephall (Circular) |
| Arriva (in Herts and Essex) | 5 | 5 Stevenage : Bus Station - Broadwater (Circular) |
| Arriva (in Herts and Essex) | 321|Sapphire | 321|Sapphire Luton - Watford |
| Arriva (in Herts and Essex) | 2 | 2 Stevenage : Bus Station - St Nicholas (Circular) |
| Arriva (in Herts and Essex) | 4 | 4 Stevenage : Bus Station - Broadwater (Circular) |
| Arriva (in Herts and Essex) | 3 | 3 Hemel Hempstead : Marlowes - Warners End - Chaulden - Marlowes |
| Arriva (in Herts and Essex) | 509 | 509 Stansted Airport - Bishop's Stortford - Sawbridgeworth - Harlow |
| Arriva (in Herts and Essex) | 6 | 6 Welwyn Garden City - Shire Park (Circular) |
| Arriva (in Herts and Essex) | SFCS | SFCS Stevenage: Football Ground - Bus Station |
| Arriva (in Herts and Essex) | 320 | 320 Hemel Hempstead, Railway Stn - Rickmansworth, Berry Lane Estate |
| Arriva (in Herts and Essex) | 8 | 8 Mount Vernon Hospital - Abbots Langley |
| Arriva (in Herts and Essex) | 508 | 508 Stansted Airport - Bishop's Stortford - Sawbridgeworth - Harlow |
| Arriva (in Herts and Essex) | 55 | 55 Stevenage - Letchworth |
| Arriva (in Herts and Essex) | 3 | 3 Stevenage : Bus Station - St Nicholas (Circular) |
| Arriva (in Herts and Essex) | 8 | 8 Stevenage : Bus Station - Symonds Green / Bragbury End (Circular) |
| Arriva (in Herts and Essex) | 309 | 309 Bishop's Stortford - Stansted Airport |
| Arriva (in Herts and Essex) | 98 | 98 Baldock - Letchworth - Hitchin |
| Arriva (in Herts and Essex) | 396 | 396 Hertford, Sele Farm - Town Centre |
| Arriva (in Herts and Essex) | 308 | 308 Bishop's Park - Bishops Stortford Station - Stansted Airport |
| Arriva (in Herts and Essex) | 97 | 97 Stotfold - Letchworth - Hitchin |
| Arriva (in Herts and Essex) | 759|Green Line | 759|Green Line Hemel Hempstead - Woodhall Farm |
| Arriva (in Herts and Essex) | 101|Sapphire | 101|Sapphire Luton - Stevenage |
| Arriva (in Herts and Essex) | 395 | 395 Hertford, Sele Farm - Ware, Fanham Common |
| Arriva (in Herts and Essex) | 251 | 251 Waltham Abbey - Waltham Cross - Cheshunt - Hammond Street |
| Arriva (in Herts and Essex) | 824 | 824 J.f. Kennedy School - Adeyfield |
| Arriva (in Herts and Essex) | 520 | 520 Maple Cross - Hemel Hempstead |
| Arriva (in Herts and Essex) | 101 | 101 Hemel Hempstead - Jarman Park (Circular) |
| Bishop's Stortford Community Transport CIO | Stortford Saturday Shopper | Stortford Saturday Shopper Herts & Essex Hospital - Town Centre - Thorley - Parsonage Estate |
| Bishop's Stortford Community Transport CIO | Stortford Shuttle | Stortford Shuttle Bishops Stortford : H&E Hospital Via Bishop's Stortford (Circular) |
| Britannia Coaches | 811 | 811 Batford - Oxlease |
| C G Myall & Son | 24 | 24 Royston Town Service |
| C G Myall & Son | 20 | 20 Anstey - Bishops Stortford |
| C G Myall & Son | 386 | 386 Bishops Stortford - Braughing |
| C G Myall & Son | 28 | 28 Buntingford - Bishops Stortford |
| C G Myall & Son | 27 | 27 Royston - Bishops Stortford |
| Centrebus South | 81A | 81A Westmill Estate - Purwell |
| Centrebus South | H3 | H3 Horns Mill - Campfield Road (Circular) |
| Centrebus South | 333 | 333 Hertford - Bengeo (Circular) |
| Centrebus South | 10 | 10 Stevenage - Old Town (Circular) |
| Centrebus South | 388 | 388 Welwyn Garden City - Hertford |
| Centrebus South | M5 | M5 Ware : Railway Station - Lower Bourne Gardens (Circular) |
| Centrebus South | 89 | 89 Henlow Camp - Hitchin |
| Centrebus South | M4 | M4 Hertford - Ware |
| Centrebus South | 81 | 81 Westmill Estate - Purwell |
| Centrebus South | 88 | 88 Luton - Hitchin |
| Centrebus South | M3 | M3 Ware : Railway Station - Wareside (Circular) |
| Centrebus South | M2 | M2 Ware : Railway Station - Fanham Common (Circular) |
| Centrebus South | H1 | H1 Hertford - Pinehurst (Circular) |
| Centrebus South | 80 | 80 Hitchin - Stevenage |
| Centrebus South | 308 | 308 Cuffley - Hertford |
| Centrebus South | 847 | 847 Roundwood Park School - Flamstead |
| Centrebus South | M1 | M1 Ware : Watton Road - Railway Station |
| Centrebus South | 46 | 46 Luton - Hemel Hempstead |
| Centrebus South | 18 | 18 Buntingford - Royston |
| Centrebus South | 846 | 846 Roundwood Park School - Markyate |
| Centrebus South | 45 | 45 Luton - Stevenage |
| Centrebus South | 178 | 178 Bus Station - Shephall (Circular) |
| Centrebus South | 380 | 380 Cuffley - Hertford |
| Centrebus South | 44 | 44 Luton - Stevenage |
| Centrebus South | 379 | 379 Stevenage - Hertford |
| Centrebus South | 315 | 315 Kimpton - Welwyn Garden City |
| Centrebus South | 378 | 378 Stevenage - Hertford |
| Centrebus South | 314 | 314 Hitchin - Welwyn Garden City |
| Centrebus South | 304 | 304 Hitchin - Sandridge - St Albans - Colney Heath / Welham Green |
| Centrebus South | 390 | 390 Stevenage - Hertford - (Ware) |
| Centrebus South | 366 | 366 Hatfield - Luton / Dunstable |
| Centrebus South | H4 | H4 Hertford North Station - Horns Mill |
| Centrebus South | 34 | 34 Dunstable - Markyate - St Albans |
| Community Action Dacorum | 212 | 212 Woodwells Cemetery - Hemel Hempstead |
| Community Action Dacorum | 207 | 207 Hemel Hempstead - Wigginton / Marsworth |
| Green Line (operated by Arriva) | 748 | 748 London Victoria - Hemel Hempstead |
| Green Line (operated by Arriva) | 724 | 724 Harlow - Heathrow Airport |
| Green Line (operated by Arriva) | 759 | 759 Hemel Hempstead - Woodhall Farm |
| Green Line (operated by Arriva) | 758 | 758 London Victoria - Hemel Hempstead |
| Harpenden Connect | HH1|Harpenden Hopper | HH1|Harpenden Hopper Harpenden : Derwent Road - West Common Way (Circular) |
| Landmark Coaches | 53 | 53 Letchworth - Wilbury Hills (Circular) |
| Little Jim's | 502 | 502 Hemel Hempstead - Northchurch |
| Little Jim's | 532 | 532 Hemel Hempstead - Northchurch |
| metcoaches | PB2 | PB2 Hemel Hempstead : Maylands Avenue - Rail Station - Town Centre - Maylands Avenue (Circular) |
| metcoaches | PB1 | PB1 Hemel Hempstead : Maylands Avenue - Town Centre - Rail Station |
| Metroline Travel | 242 | 242 Potters Bar - Waltham Cross |
| Metroline Travel | 84 | 84 St Albans - New Barnet |
| Metroline Travel | 292 | 292 Colindale - Borehamwood |
| Metroline Travel | 305 | 305 Sandridge - Potters Bar |
| Metroline Travel | PB1 | PB1 Potters Bar - Rushfield (Circular) |
| Mullany's Buses | 311 | 311 Leavesdon Studios Tour - Watford Junction |
| Mullany's Buses | 318 | 318 Abbots Langley - Watford |
| Red Eagle | ML1 | ML1 Hemel Hempstead, Railway Stn - Maylands Avenue (Circular) |
| Red Eagle | 361 | 361 Garston / Bricket Wood - St Albans / New Greens Estate |
| Red Eagle | S1 | S1 St Albans: Cell Barnes - City Rail Station - City Centre |
| Red Eagle | 1 | 1 Leverstock Green - Adeyfield (Circular) |
| Red Eagle | W1 | W1 Watford - Kingswood |
| Red Eagle | H11 | H11 Hemel Hempstead - Boxmoor / Chambersbury Lane (Circular) |
| Red Eagle | W4 | W4 Watford & Meriden Circular |
| Red Eagle | 807 | 807 Harpenden - Markyate |
| Red Eagle | R2 | R2 Watford / Mount Vernon Hospital - Chorleywood |
| Red Eagle | 31 | 31 Aldbury - Hemel Hempstead |
| Red Eagle | 30 | 30 Aldbury - Hemel Hempstead |
| Red Eagle | W3 | W3 Watford & Meriden Circular |
| Red Eagle | E21 | E21 The Harefield Academy - Rickmansworth |
| Red Eagle | 307 | 307 Harpenden - Redbourn |
| Red Eagle | W22 | W22 The Bushey Academy - South Oxhey |
| Red Eagle | KL80 | KL80 Kings Langley School - Kings Langley |
| Red Eagle | 354 | 354 Chesham - Berhamsted / Northchurch |
| Red Eagle | S9 | S9 Marshalswick - St Albans (Circular) |
| Red Eagle | 319 | 319 Chipperfield - North Watford (Circular) |
| Red Eagle | R1 | R1 Mount Vernon Hospital - Maple Cross |
| Red Eagle | W21 | W21 Westfield Community College - Carpenders Park |
| Red Eagle | S8 | S8 Marshalswick - St Albans (Circular) |
| Red Eagle | W20 | W20 Watford, Brocklesbury Close - Oxhey Hall (Circular) |
| Red Eagle | 29 | 29 Berkhamsted - Hemel Hempstead |
| Red Eagle | S7 | S7 Marshalswick - St Albans (Circular) |
| Red Eagle | W2 | W2 Watford & Meriden Circular |
| Red Eagle | HA1 | HA1 Harpenden - Harpenden |
| Red Eagle | S6 | S6 St Albans Circular |
| Red Rose Travel | 389 | 389 Tring - Aldbury / Wigginton |
| Red Rose Travel | W18 | W18 Watford, Morrisons - North Bushey (Circular) |
| Red Rose Travel | 501 | 501 Watford - Aylesbury |
| Red Rose Travel | W1 | W1 Garston / Watford - Maple Cross |
| Red Rose Travel | 387 | 387 Tring - Aldbury / Wigginton |
| Red Rose Travel | H10 | H10 Hemel Hempstead - Boxmoor / Leverstock Green |
| Red Rose Travel | 850 | 850 Hemel Hempstead - Bovingdon |
| Red Rose Travel | W30 | W30 Watford - Business Park (Circular) |
| Red Rose Travel | 397 | 397 Tring - Aldbury / Wigginton |
| Red Rose Travel | W19 | W19 Watford - Carpenders Park (Circular) |
| Redline | S5 | S5 St Albans : St Peter's Street - Cottonmill Estate (Circular) |
| Redline | S4 | S4 St Albans : Railway Station - Cottonmill Estate (Circular) |
| Richmonds Coaches | 90 | 90 Royston - Letchworth |
| Richmonds Coaches | 386 | 386 Bishops Stortford - Stevenage |
| Richmonds Coaches | 16 | 16 Royston Burns Road - Town Centre (Circular) |
| Richmonds Coaches | 91 | 91 Royston - Letchworth |
| Sullivan Buses | 303 | 303 Nicholas Breakspear School - Borehamwood |
| Sullivan Buses | 358 | 358 Nicholas Breakspear School - Borehamwood |
| Sullivan Buses | 331 | 331 Nicholas Breakspear School - Welwyn Garden City |
| Sullivan Buses | 330 | 330 Nicholas Breakspear School - Hatfield |
| Sullivan Buses | 355 | 355 Nicholas Breakspear School - Potters Bar |
| Sullivan Buses | 398 | 398 Potters Bar - Watford |
| Sullivan Buses | B3 | B3 Borehamwood Town Service Organ Hall Farm - Well End Circular |
| Sullivan Buses | 306 | 306 Watford - Borehamwood (Circular) |
| Sullivan Buses | 833 | 833 Garston, St Michael's School - South Oxhey / Carpenders Park |
| Sullivan Buses | 823 | 823 Garston, St Michael's School - Borehamwood |
| TrustyBus | 242 | 242 Welwyn Garden City / Hammond Street - Waltham Cross |
| TrustyBus | 384 | 384 Hertford - Stevenage |
| TrustyBus | 383 | 383 Hertford - Stevenage |
| TrustyBus | 351 | 351 Bishop's Stortford - Hertford |
| TrustyBus | 410 | 410 Waltham Cross - Cheshunt - Broxbourne - Hoddesdon - Harlow |
| Uno | 312 | 312 Hatfield - Bell Bar |
| Uno | 404 | 404 Welwyn Garden City - South Hatfield |
| Uno | 611 | 611 Enfield - Hatfield |
| Uno | 201 | 201 Welwyn Garden City - Welham Green |
| Uno | 610|dragonfly | 610|dragonfly Enfield - Luton |
| Uno | H19 | H19 Hemel Hempstead - Kings Langley |
| Uno | 200 | 200 London Colney - Essendon Mill |
| Uno | 602 | 602 Watford - Shenley - St Albans - Hatfield |
| Uno | R9 | R9 North Watford - Chipperfield |
| Uno | 601 | 601 Borehamwood - Welwyn Garden City |
| Uno | 230 | 230 St Albans - Welwyn Garden City |
| Uno | 357 | 357 Redbourn - St Albans |
| Uno | 215 | 215 Welwyn Garden City - Codicote |
| Uno | R17 | R17 Hatch End - Carpenders Park |
| Uno | 653|tigermoth | 653|tigermoth Welwyn Garden City - St Albans (New Greens Est) |
| Uno | R16 | R16 South Oxhey - North Watford Superstores |
| Uno | 644|The Comet | 644|The Comet Queensbury - Hatfield |
| Uno | 641 | 641 Hatfield - Hertford - Broxbourne |
| Uno | Inter-campus Shuttle | Inter-campus Shuttle Hatfield UH Inter-campus Shuttle |
| Uno | 206 | 206 Welwyn Garden City - Panshanger (Circular) |
| Uno | 635 | 635 Hatfield - Hitchin |
| Uno | 204 | 204 Welwyn North, Tewin & Welwyn Garden City Circular |
| Uno | 304 | 304 Wheathampstead - St Albans |
| Uno | 635 | 635 Watford - Hatfield |
| Uno | 341 | 341 Hatfield - Hertford - Broxbourne |
| Uno | 203 | 203 Welwyn Garden City - Watton At Stone |
| Uno | 405 | 405 Welwyn Garden City - South Hatfield |
| Uno | 612 | 612 Hatfield - Luton |
| Uno | 51 | 51 Chipperfield - Hemel Hempstead |
| Vale Travel | 352 | 352 Hemel Hempstaed - Watford |
