IA (イア) is a Japanese VOCALOID developed and distributed by 1st PLACE Co., Ltd., and was released in January 2012 for the VOCALOID3 engine. Her voice is provided by the Japanese female singer-songwriter, Lia, known for "Tori no Uta".

She received an additional VOCALOID3 voicebank known as IA ROCKS in June 2014. In March 2017, she received a CeVIO talk voicebank.

In July 2016, an English voicebank was confirmed to be in the works,[2][3][4] and was later released for CeVIO in June 2018.