L
- Lady's Wood: TL244826
- Ladybush Close, Madingley: TL412605
- Lammas Land: TL445575
- Landbeach: TL476650
- Landbeach Pits: TL485655
- Landy Green Way, Castor: TL130978
- Langwood Fen: TL435855
- Lark Rise Farm - See Barton (Lark Rise Farm)
- Lattenbury Hill: TL270660
- Lattersey NR: TL291968
- Laundry Farm: TL426576
- Leighton Bromswold: TL115752
- Leighton Gorse: TL095755
- Leverington: TF445115
- Ley Grove Cottages: TL463498
- Limekiln Close NR: TL486560
- Limepit Hill: TL507552
- Linton: TL565470
- Litlington: TL313426
- Litlington Pit: TL315417
- Little Abington: TL530494
- Little Downham: TL523838
- Little Eversden: TL375533
- Little Fen: TL377745
- Little Gidding: TL128817
- Little Less Wood: TL217778
- Little Linton Farm: TL555475
- Little Ouse: TL622891
- Little Paxton: TL189625
- Little Paxton Pits - See Paxton Pits
- Little Paxton Wood: TL170635
- Little Shelford: TL455515
- Little Stukeley: TL210755
- Little Thetford: TL532762
- Little Wilbraham: TL544585
- Little Wilbraham Fen: TL525587
- Littless Wood - See Grafham Water (Littless wood)
- Lode: TL535625
- Lolworth: TL368640
- Long Drove (Cottenham) - See Cottenham (Long Drove)
- Long Drove (Haddenham) - See Haddenham (Long Drove)
- Longstanton: TL395665
- Longstowe Hall: TL308555
- Longthorpe: TL165985
- Lords Holt: TL310992
- Lordsbridge: TL397547
- Lotting Fen: TL245853
- Lound Wood: TF060012
- Lower Farcet Fen: TL255915
- Lower Wood: TL625528
- Lynch Wood: TL140970