Fackenden Down is a 14-hectare (35-acre) nature reserve north of Sevenoaks in Kent.

It is managed by the Kent Wildlife Trust.

[1] It is part of the Kent Downs Area of Outstanding Natural Beauty and the Otford to Shoreham Downs Site of Special Scientific Interest[2] This site is mainly chalk grassland, with some woodland and scrub.

There are a variety of orchids, and butterflies such as the brown argus, common blue and dark green fritillary.

[1] There is access from a road off Shoreham Road opposite Darenth Valley Golf Club.