Tristan Voorspuy was killed by pastoral herders on Sunday in Laikipia while inspecting some of his lodges, a local police official told Associated Press.
It follows a pattern of traditional herdsmen invading ranches in the area to seize pasture amid an ongoing drought.
Mr Voorspuy was the founder of luxury safari company Offbeat Safaris.
Martin Evans, chairman of the Laikipia Farmers Association, said Mr Voorspuy was attacked while inspecting a lodge that had been set alight by so-called “land invaders”.
When he did not return by Sunday afternoon, an aerial search spotted Voorspuy’s injured horse but did not catch sight of the rancher, Mr Evans said.
A ground team later found his body by the ruins of the house.