Trondhjems Omnibus Aktieselskab was the first provider of public transport in Trondheim, Norway. From 1893 to 1902, it operated a horse-hauled coach service in Trondheim. Until 1901 it operated the profitable Voldsminde–Ila route, but then the Trondheim Tramway took over the route, and the company was forced to operate a less profitable route from the railway station to Øya. The company went bankrupt the following year.
