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- Claxby with Moorby - The Revesby Estate - CA-7-1-528
- Claythorpe - Land at Manor Farm and Lime Pits Farm - CA-7-1-206
- Claythorpe - Land at N M Stovin Farms - CA-7-1-2-2
- Claythorpe - Land at N M Stovin Farms - CA-7-1-2-3
- Claythorpe - Land at N M Stovin Farms - CA-7-1-2-4
- Coleby - Land at Harmston Lowfields and at Coleby Lowfields - CA-7-1-623
- Coleby - Land at RAF Waddington - CA-7-1-109
- Colsterworth - Land at Glebe Farm - CA-7-1-404
- Colsterworth - Land at Woolsthorpe Manor - CA-7-1-116-1
- Colsterworth - Land at Woolsthorpe Manor - CA-7-1-116-2
- Colsterworth - Land known as 11 Trust of Buckminster Estate - CA-7-1-369
- Colsterworth - Land known as 12 Trust of Buckminster Estate - CA-7-1-370
- Colsterworth - Land south of Bitchfield and land between Colsterworth and Burton-le-Coggles - CA-7-1-432
- Colsterworth - Land to the south of Bitchfield and land northeast of Skillington - CA-7-1-431
- Coningsby - Land and buildings at Carr Farm, The Bungalow and Lodge Farm - CA-7-1-551
- Coningsby - Land at Carr Farm - CA-7-1-32
- Coningsby - Land at RAF Coningsby - CA-7-1-168
- Coningsby - Land at RAF Coningsby - CA-7-1-31
- Coningsby - Land at the south east side of Tumby Road - CA-7-1-255
- Coningsby - The Tumby Estate - CA-7-1-546
- Corby Glen - Land adjoining Irnham Road - CA-7-1-496
- Corby Glen - Land at Birkholme - CA-7-1-444
- Corby Glen - Land at Manor Farm and Spring Farm - CA-7-1-98
- Corby Glen - Land at the Irnham Estate - CA-7-1-278
- Corby Glen - Land at the Irnham Estate - CA-7-1-59
- Corby Glen - Land south of Bitchfield and land between Colsterworth and Burton-le-Coggles - CA-7-1-432
- Corby Glen - Land surrounding Grimsthorpe Park and land at Langtoft - CA-7-1-620
- Corby Glen - Land to the south of Bitchfield and land northeast of Skillington - CA-7-1-431
- Corringham - Land at Redhouse Farm, Southorpe Farm, Grange Farm and Low Farm – CA-7-1-622
- Corringham - Land at Thonock and Somerby Estates - CA-7-1-107
- Corringham - Land forming part of Thonock and Somerby Estates (TSE1) – CA-7-1-364
- Corringham - Land forming part of Thonock and Somerby Estates (TSE2) – CA-7-1-365
- Counthorpe and Creeton - Land surrounding Grimsthorpe Park and land at Langtoft - CA-7-1-620
- Cranwell and Byard's Leap - Land at High Dyke Farm - CA-7-1-113
- Cranwell and Byard's Leap - Land at RAF Cranwell - CA-7-1-174
- Cranwell and Byard's Leap - Land at RAF Cranwell - CA-7-1-33
- Cranwell and Byard's Leap - The Ewerby Estate - CA-7-1-345
- Cranwell, Brauncewell and Byard's Leap - Land at various locations - CA-7-1-513
- Croft - Land adjoining Northolme Hall, Wainfleet - CA-7-1-517
- Croft - Land at Clough Farm - CA-7-1-3-1
- Croft - Land at Croft - CA-7-1-371
- Croft - Land at Gibraltar Point Extensions - CA-7-1-216
- Croft - Land at Gibraltar Point Nature Reserve - CA-7-1-127
- Croft - Land at Haven House Farm - CA-7-1-221-3
- Croft - Land at various reserves owned by Lincolnshire Wildlife Trust - CA-7-1-438
- Crowland - Land in the parish of Crowland - CA-7-1-459
- Crowland - Land owned by College of St John the Evangelist - CA-7-1-515
- Culverthorpe and Kelby - Land at Culverthorpe Estates - CA-7-1-34
- Culverthorpe and Kelby - Land at Culverthorpe Hall Farm, Dorrington House Farm and land at Dembleby - CA-7-1-439
- Cumberworth - Land at Willoughby Farms - CA-7-1-184