In January and February 2017, symptoms of yellowing and leaf curling were observed in open-field Roma-type tomato plants in 7 states (Kaduna, Kano, Katsina, Kebby, Jigawa, Sokoto and Zamfara) of northern Nigeria. Almost 100% of the plants in the surveyed fields showed symptoms and were also heavily infested with the whitefly Bemisia tabaci. Leaf samples were collected from 21 symptomatic plants, each from a different local government area, 3 per state, and analysed in the laboratory. The presence of Tomato chlorosis virus (ToCV) was detected on the symptomatic plants based on various molecular analyses. This is thought to be the first report of the presence of ToCV in Nigeria.