Ucolta is a locality in the Mid North region of South Australia. It is named for a railway station on the Broken Hill-Port Pirie railway line. Trains no longer stop at Ucolta. It is also where the Barrier Highway first meets the railway line, and the Wilmington–Ucolta Road which connects across the northern side of the Mid North, providing the shortest road route from Western Australia and Eyre Peninsula via Port Augusta to Broken Hill and New South Wales.
The name Ucolta was recorded as a native name in 1862, but its meaning has been lost.
The former Ucolta Post Office was in the railway station.