Krishna Istha (born 1993/1994) is a comedian, writer, and performance artist based in London. They have performed across the United Kingdom, Germany, Australia, and the United States of America.

Istha, who is of Indian descent, is originally from Bangalore. They grew up in Sydney.

Istha first became interested in stand-up comedy after seeing performances by Zoë Coombs Marr and Hannah Gadsby. This experience broadened their perspective on the potential of stand-up comedy and its inclusivity. Growing up, Istha recalls being a "goofy" child, often engaging in performances to make others laugh.

Since 2013, Krishna Istha has been involved in various artistic endeavors across theatre, opera, comedy, and performance art.

Istha’s first solo show, Beast, directed by Zoë Coombs Marr, is a stand-up comedy piece that reflects on their experience being transgender. They've also been part of Fck Fabulous*, a variety show by Yana Alana and have collaborated on a play with Travis Alabanza and Emma Frankland for a company of young trans actors.

In 2017, Istha helped establish the Australian chapter of the Cocoa Butter Club, alongside Dani Boi. The cabaret and performance night showcases and celebrates Indigenous and performers of colour, with events running quarterly at the Melba Spiegeltent in Melbourne. The Cocoa Butter Club Australia also staged a sold-out show at Arts Centre Melbourne as part of the Midsumma Festival in 2018.

In 2020, Istha was awarded a bursary from Artsadmin to support their artistic work.

Istha wrote for season 4 of the Netflix series Sex Education, which was released in 2023.