Geoffrey Rigathi Gachagua (born 28 February 1965) is a Kenyan politician who served as the 12th deputy president of Kenya from 2022 until his impeachment in October 2024.

On 31 October 2024 the High Court declined to extend conservatory orders that blocked the swearing in of Deputy President nominee Kithure Kindiki.

He was born in 1965 in Hiriga village of Nyeri County, the child of Gachagua Reriani and Martha Kirigo.

In 1985, he joined the University of Nairobi, where he graduated with a Bachelor of Arts Degree in Political Science and Literature in 1988.

He speaks about ordinary people...”[18] In 2017, Gachagua took on Keriako Tobiko as the Cabinet Secretary for Environment and Forestry.

[19] Gachagua claimed that many of the intakes destroyed were legal and that this had occasioned a water crisis for thousands of people.

He did not do due diligence on the legality of the intakes and he failed in analysis of the humanitarian crisis arising from the situation.” [20] The Minister of Water and Sanitation, Simon Chelugui, was drawn into the fray, meeting with Gachagua and other Mt Kenya legislators over the matter.

[23] He was also critical of the alleged market advantages the Chinese received when carrying out government business, he said "What is annoying us is that once they get a contract the materials coming for the construction is procured from China, and they import it duty free.

[25] On 15 May 2022, he was nominated as the running mate to the United Democratic Alliance presidential candidate William Ruto under the Kenya Kwanza political coalition.

Others who were eyeing the same position included Kirinyaga Governor Anne Waiguru, Kandara MP Alice Muthoni Wahome, Tharaka Nithi Senator Kithure Kindiki and National Assembly Speaker Justin Muturi.

[15] Eleven articles of impeachment were brought against him, including corruption, ethnic discrimination and contradicting government policies.

[32] On 15 October, the High Court dismissed Gachagua's motion to annul the impeachment proceedings,[33] leading to the Senate opening the procedure later in the day.

[39] Following his impeachment and discharge from hospital, Gachagua said that his security detail had been withdrawn and accused government agents of trying to fatally poison him on two separate occasions.