Dangarembga was found guilty by a lower court in 2022 on charges of participating in a public gathering with intent to incite public violence while breaking Covid-19 protocols, after a protest criticising the government's efforts to deal with corruption and a struggling economy in July 2020. Dozens of political activists were arrested at the time.
"I can confirm that she has been acquitted. As her lawyers we are grateful because she had not committed any offence in the first place," said lawyer Harrison Nkomo.
He said the High Court judges did not immediately give reasons for the acquittal.
A fierce critic of President Emmerson Mnangagwa's government who has been fighting for years against corruption and demanding reforms, Dangarembga had maintained during the trial that Zimbabweans have the right to demonstrate.
Not all protesters were treated with leniency. Zimbabwean courts have handed out a wave of harsh sentences against political activists ahead of general elections later this year.
Opposition leader Jacob Ngarivhume, who was arrested at the same time with Dangarembga for organising protests, was last week sentenced to four years in prison on charges of inciting violence.
Dangarembga's first novel, Nervous Conditions, won the African section of the Commonwealth Writers' Prize in 1989. Her book This Mournable Body was nominated for a Booker Prize in 2020.
Reuters, the news and media division of Thomson Reuters, is the world's largest multimedia news provider, reaching billions of people worldwide every day.Go to: https://www.reuters.com/