Weta (plural weta) is the common name for a group of about 70 insect species in the families Anostostomatidae and Rhaphidophoridae, endemic to New Zealand. The word is from the Maori language, where singular and plural have the same form.

Weta, Wetas or WETA may refer to:

• Weta, an orthopterous insect in one of several genera endemic to New Zealand
• Weta Trimaran, a 4.4 meter fibreglass/foam composite trimaran with a boomless main, jib and roller furling gennaker.
• Weta Workshop, a special effects and prop company based in Miramar, New Zealand
• Weta Digital, a digital visual effects company based in Wellington, New Zealand
• Weta (band) (1995-2001), a New Zealand rock band
• WETA-TV, a television station (channel 26 analog/27 digital) licensed to Washington, D.C., United States
• WETA (FM), a radio station (90.9 FM) licensed to Washington, D.C., United States
• San Francisco Bay Area Water Emergency Transportation Authority