Mecodema jacinda is a large-bodied ground beetle endemic to Maungatautari Sanctuary, Waikato, New Zealand.

It is the largest species of Mecodema found on Maungatautari, which also has the medium-sized M. curvidens inhabiting the forest.

It is named after former New Zealand Prime Minister Jacinda Ardern.

Colour of entire body matte to glossy black (especially pronotum).

[2] Relatively common and can be found under logs and rocks in native forest.