Hertfordshire
Historic counties data provided by Association of British Counties / Historic Counties Trust.
| Name | Location | County | Country | Power source | Type | Function | River |
| Abbey Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | ||
| Apsley Mill, Apsley | Apsley | Hertfordshire | United Kingdom | Water | Watermill | Paper mill | Gade |
| Aspenden Mill, Buntingford | Buntingford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Barnet Gate Mill, Arkley | Arkley | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Batford Mill, Wheathampstead | Wheathampstead | Hertfordshire | United Kingdom | Water | Watermill | ||
| Beech Flour Mill, Bishop's Stortford | Bishop's Stortford | Hertfordshire | United Kingdom | Electricity | Roller flour mill | Corn mill | |
| Bourne End Mill, Bourne End | Bourne End | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Bulbourne |
| Breachwood Green Mill, King's Walden | King's Walden | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Bridge Mill, Wheathampstead | Wheathampstead | Hertfordshire | United Kingdom | Water | Watermill | ||
| Castle Mill, Berkhamsted | Berkhamsted | Hertfordshire | United Kingdom | Corn mill | |||
| Charlton Watermill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Charlton Windmill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Church End Farm Donkey Wheel, Kensworth | Kensworth | Hertfordshire | United Kingdom | Animal | Pumping mill/wheel | ||
| Corey's Mill, Stevenage | Stevenage | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Cromer Mill, Cromer | Cromer | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Dicker Mill, Hertford | Hertford | Hertfordshire | United Kingdom | Water | Watermill | Oil mill | |
| Digswell Mill, Welwyn Garden City | Welwyn Garden City | Hertfordshire | United Kingdom | Water | Watermill | ||
| Doolittle Mill, Redbourn | Redbourn | Hertfordshire | United Kingdom | Water | Watermill | ||
| East Hyde Mill, Wheathampstead | Wheathampstead | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Frogmore Paper Mill, Apsley | Apsley | Hertfordshire | United Kingdom | Water | Watermill | Paper mill | Gade |
| Fulling mill, Codicote | Codicote | Hertfordshire | United Kingdom | Water | Watermill | Fulling mill | |
| Fulling mill, Welwyn | Welwyn | Hertfordshire | United Kingdom | Water | Watermill | Fulling mill | |
| Gamnel Wharf Mill, Tring | Tring | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | Grand Union Canal |
| Gatesbury Mill, Braughing | Braughing | Hertfordshire | United Kingdom | Water | Watermill | ||
| Goldfield Mill, Tring | Tring | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Grove Mill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Water | Watermill | ||
| Grove Mill, Watford | Watford | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Gade |
| Hamper Mill, Watford | Watford | Hertfordshire | United Kingdom | Water | Watermill | Paper mill | Colne |
| Heygates Mill, Tring | Tring | Hertfordshire | United Kingdom | Electricity, Steam | Roller flour mill | Corn mill | |
| High Street, Whitwell | Whitwell | Hertfordshire | United Kingdom | Water | Watermill | ||
| Horns Mill, Brickendon | Brickendon | Hertfordshire | United Kingdom | Water | Watermill | Corn mill, Oil mill, Tannery | Lea |
| Hunton Bridge Mill, Hunton Bridge | Hunton Bridge | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Gade |
| Hunton Bridge Waterwheel, Abbotts Langley | Abbotts Langley | Hertfordshire | United Kingdom | Water | Watermill | ||
| Ickleford Mill, Ickleford | Ickleford | Hertfordshire | United Kingdom | Electricity, Steam, Water | Roller flour mill, Watermill | Oughton | |
| Jack's Hill, Graveley | Graveley | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Kings Langley Mill, Kings Langley | Kings Langley | Hertfordshire | United Kingdom | Electricity, Steam, Water | Roller flour mill, Watermill | Corn mill | Gade |
| Kingsbury Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Ver |
| Lannock Mill, Weston | Weston | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Lower Mill, Berkhamsted | Berkhamsted | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Bulbourne |
| Lucas's Mill, Gaping Hills, Hitchin | Gaping Hills, Hitchin | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Mile End Farm Mill, Therfield, Reed | Therfield, Reed | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Mill Green Mill, Hatfield | Hatfield | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Lea |
| Moor Mill, Colney Street | Colney Street | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Ver |
| Nash Farm Donkey Wheel, Kensworth | Kensworth | Hertfordshire | United Kingdom | Animal | Pumping mill/wheel | ||
| New Barnes Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | ||
| New Mill, Standon | Standon | Hertfordshire | United Kingdom | Electricity, Steam | Roller flour mill | Corn mill | |
| Noke Mill, Great Gaddesden | Great Gaddesden | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Norton Mill, Baldock | Baldock | Hertfordshire | United Kingdom | Water | Watermill | ||
| Old Mill, Cassiobury Park | Watford | Hertfordshire | United Kingdom | Water | Watermill | Pumping mill/wheel | Gade |
| Old Mill, Standon | Standon | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Papermill House, Standon | Standon | Hertfordshire | United Kingdom | Water | Watermill | Paper mill | |
| Parson's Mill, Bishops Stortford | Bishops Stortford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Patmore Heath Mill, Albury | Albury | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Piccott's End Mill, Hemel Hempstead | Hemel Hempstead | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Gade |
| Piper's Mill, Harlow | Harlow | Hertfordshire | United Kingdom | Steam | Corn mill | ||
| Post mill (1), Great Munden | Great Munden | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Post mill (2), Great Munden | Great Munden | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Post mill, Great Hormead | Great Hormead | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Praemill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | ||
| Purwell Mill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Water | Watermill | ||
| Redbournbury Watermill, Redbournbury | Redbournbury | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Ver |
| Saw mill, Hatfield Park | Hatfield Park | Hertfordshire | United Kingdom | Water | Watermill | Saw mill | |
| Scotsbridge Mill, Croxley Green | Croxley Green | Hertfordshire | United Kingdom | Water | Watermill | ||
| Sele Mill, Hertford | Hertford | Hertfordshire | United Kingdom | Steam, Water | Roller flour mill, Watermill | Corn mill | Lee |
| Shafford Farm Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | ||
| Silk mill, Tring | Tring | Hertfordshire | United Kingdom | Water | Watermill | Silk mill | |
| Smock mill, Barkway | Barkway | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Smock mill, Brent Pelham | Brent Pelham | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Smock mill, Bushey Heath | Bushey Heath | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Smock mill, Great Hormead | Great Hormead | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Smock mill, Little Hadham | Little Hadham | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Smock mill, Standon | Standon | Hertfordshire | United Kingdom | Wind | Smock mill | Corn mill | |
| Solesbridge Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | Ver | |
| South Mill, Bishops Stortford | Bishops Stortford | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Sow Mill, Bishops Stortford | Bishops Stortford | Hertfordshire | United Kingdom | Water | Watermill | ||
| St Michael's Mill, St Albans | St Albans | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Stanstead Abbotts Mill, Roydon Road, Stanstead Abbotts | Roydon Road, Stanstead Abbotts | Hertfordshire | United Kingdom | Water | Watermill | ||
| Station Mill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Electricity, Steam | Roller flour mill | Corn mill | |
| The Mount, Sandon | Sandon | Hertfordshire | United Kingdom | Wind | Post mill | Corn mill | |
| Tower mill, Anstey | Anstey | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Tower mill, Colney Heath | Colney Heath | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Tower mill, Croxley Green | Croxley Green | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Tower mill, Goff's Oak | Goff's Oak | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Tower mill, Great Offley | Great Offley | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Tower mill, Much Hadham | Much Hadham | Hertfordshire | United Kingdom | Wind | Tower mill | Corn mill | |
| Town Mill, Bishops Stortford | Bishops Stortford | Hertfordshire | United Kingdom | Electricity, Steam | Roller flour mill | Corn mill | |
| Town Mill, Hertford | Hertford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Town Mill, Sawbridgeworth | Sawbridgeworth | Hertfordshire | United Kingdom | Electricity, Steam, Water | Roller flour mill, Watermill | Corn mill | Stort |
| Twyford Mill, Bishops Stortford | Bishops Stortford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Upper Mill, Berkhamsted | Berkhamsted | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Bulbourne |
| Watermill, Ashwell | Ashwell | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Broxbourne | Broxbourne | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Codicote | Codicote | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Digswell | Digswell | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Easneye | Easneye | Hertfordshire | United Kingdom | Water | Watermill | Pumping mill/wheel | |
| Watermill, Essendon | Essendon | Hertfordshire | United Kingdom | Water | Watermill | Lea | |
| Watermill, Hertingfordbury | Hertingfordbury | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Maran |
| Watermill, Hexton | Hexton | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Hunsdon | Hunsdon | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Kimpton | Kimpton | Hertfordshire | United Kingdom | Water | Watermill | Maran | |
| Watermill, Lemsford | Lemsford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, New Barnes | New Barnes | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Park Street | Park Street | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Radwell | Radwell | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Sarratt | Sarratt | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Sopwell | Sopwell | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Tewin | Tewin | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | Maran |
| Watermill, Tonwell | Tonwell | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Troy Mill | Troy Mill | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Wadesmill | Wadesmill | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Walkern | Walkern | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Waterford | Waterford | Hertfordshire | United Kingdom | Water | Watermill | ||
| Watermill, Watton at Stone | Watton at Stone | Hertfordshire | United Kingdom | Water | Watermill | ||
| Waterwheel pump, Kinnersley | Kinnersley | Hertfordshire | United Kingdom | Water | Pumping mill/wheel | Upcott Brook | |
| West Mill, Ware | Ware | Hertfordshire | United Kingdom | Water | Watermill | Corn mill | |
| Westmill, Hitchin | Hitchin | Hertfordshire | United Kingdom | Water | Watermill | ||
| Wheel House, Chorleywood | Chorleywood | Hertfordshire | United Kingdom | Water | Watermill | Chess |