Nepenthes × bauensis (/nɪˈpɛnθiːz baʊˈɛnsɪs/; after Bau, Sarawak) is a natural hybrid involving N. gracilis and N.

It displays the clumping habit and vine growth of N. gracilis, but can be distinguished from that species on the basis of its larger leaves and stems.

Pitchers are up to 15 cm high and may be pale green to purplish-red in colour.

Like its parent species, N. × bauensis is a lowland plant that grows at an elevation of around 100 m. It is terrestrial in nature and inhabits swampy areas surrounding the limestone hills to which N. northiana is endemic.

N. × bauensis is one of only three known natural hybrids involving N. northiana, the others being N. × cincta and a cross with N. mirabilis.