Tophill Low is a nature reserve and Site of Special Scientific Interest (SSSI) in the East Riding of Yorkshire, England.

[2] It is important as one of few inland standing open water bodies suitable for wintering wildfowl in the East Riding of Yorkshire.

The reservoirs support nationally important numbers of gadwall, shoveler, and tufted duck.

Also present are locally important numbers of goldeneye, great crested grebe, mallard, pochard, teal, and wigeon.

[3] The wider nature reserve comprises a variety of habitats with grassland, marshes, ponds, and woods supporting over 160 bird species across the year.