| F 23 | 48 | | Blockmoor fen |
| F 24-5 | 67 | | The Hasse |
| Faerys | 38 | 398.821 | Chatteris |
| Fen Ditton | 46, 45, 55, 56 | | |
| Fen Drayton | 36, 37 | | |
| Ferry Hill | 38 | 383.838 | Chatteris |
| Ferry Hill Farm | 38 | 38-83- | Chatteris |
| Ferry Station | 41 | 456.140 | Newton, Vc 28 |
| Finch's Walk | 45 | 454.567 | Cambridge |
| The Fire Lots | 49 | 43-93- | Wimblington |
| Fish & Duck | 57 | 53-74- | Lt Thetford |
| Five Mile bank | | | nr Whittelsey |
| Flat Bridge Farm | 47 | 418.729 | Haddenham |
| Fleam Dyke | 55 | 554.537 | Fulbourn/Gt Wilbraham |
| Foot Road | 41 | 463.101 | Wisbech |
| Footfields | ?41 | | Wisbech to West Walton |
| Footway to Hinton | 45 | | Cambridge/Cherry Hinton |
| Fordham | 67, 56, 57, 66 | | |
| Fordham Moor | 67 | 631.716 & 620.735 | Fordham |
| Fordham Station | 66 | 61-69-, | Fordham |
| Fordham Woods | 67 | 6336981 | (in part Brackland Roughs) |
| Fordham Hall Woods | 66, 67 | 62-01-, 63-01-, 62-69-,63-69 | Fordham |
| Forty Foot Drain | 38 | | Chatteris |
| 40 Foot below Carter's Bridge | 38 | 38-88- | Chatteris |
| Forty Foot Drain near the Three Pots | 48 | 42-87- | Chatteris |
| Fortrey's Hall Farm | 48 | 443.826 | Chatteris |
| Fortrey House | 48 | 44-81- | Mepal |
| Foul Anchor | 41 | 466.178 | Tydd St Giles |
| Foulmire Common | 44 | | =Fowlmere Watercress Beds/RSPB Reserve |
| Four Gouts (Gotes) | 41 | 450.163 | Tydd St Giles |
| Four Gouts Bridge | 41 | 450.164 | Tydd St Giles |
| Four Miles Stable | 56 | 585.600 | Swaffham Bulbeck |
| Fowlmere | 44 | | |
| Fowlmere Watercress Beds | 44 | 406.454 | Fowlmere & Melbourn |
| Fox Hill | 35 | 36-51- | Orwell /A.603 |
| Fox-hole-down Farm | 35 | 378.506 | Barrington |
| Foxton | 44, 34, 45 | | |
| Frog End | 34 | 39-46- | Shepreth |
| Frog Moor | ? | ? | Little Shelford |
| French Drove Station | 30- | 33-09- | Thorney |
| Friday Bridge | 40 | 466.049 | Wisbech |
| Fryer's Holt | ?38 | | Fryer's = ? A Fryer |
| Fulbourn | 55, 45 | | |
| Fulbourn Fen/Nature Reserve | 55 | 526.557, 530.560 | Fulbourn |
| Fulbourn Moor | 55 | | Fulbourn |
| Fulbourn footway to Mill | 55 | 52-56- to 528.558 | Fulbourn |
| Fulbourn Mill House | 55 | 528.558 | Fulbourn |
| Furze Hills | 54 | 554.485 | Hildersham |