Voi is the largest town in Taita-Taveta County, Kenya, in the former Coast Province. It is located at the western edge of Taru Desert, south and west of Tsavo East National Park, with the Sagala Hills to the south.

Voi serves as a marketplace for agricultural and meat products from Taita Hills as well as other surrounding areas.

The town centre consists mainly of general stores, shops, markets, kiosks and hotels. Most lodges that service tourists for the national parks are located in the suburbs at the edge of town. The Voi Sisal Estates are located to the west of the town.

A settlement at Voi (Known as Ore by Sagalas(natives of the Town) was established in 1897, in the form of a camp that served as a resting place on the Uganda Railway, which was then under construction.

Most of the settlement's early residents were Indians working on the railway. At that time, other human habitation in the area was limited, due to a fear of wild animals, especially lions. The native people of the area were living in the hills.

During the 20th century, people gradually moved to Voi to work on the railway, and on the nearby sisal estates. The influx included native people from Sagalla, mostly farmers who started tilling the land along the River Voi (better known to them as mgogoni), and further Indians, who were relocating for business purposes.

Township status with an area of about 16.27 square kilometres (6.28 sq mi) was not granted until 1932.^{[citation needed]} The town has long since outgrown the original grant; as of 2022, it had a land area of 55.31 km² (21.36 sq mi), and the highest population growth rate among the towns in the county.^{[citation needed]}

Voi has a hot semi-arid climate (Köppen climate classification BSh).