A new distribution map is provided for Obolodiplosis robiniae. Diptera: Cecidomyiidae. Host: black locust (Robinia pseudoacacia). Information is given on the geographical distribution in Europe (Albania; Austria; Bosnia-Hercegovina; Croatia; Czech Republic; Denmark; Corsica, France; Germany; Greece; Hungary; Mainland Italy and Sicily, Italy; Luxembourg; Macedonia; Netherlands; Poland; Romania; Serbia; Slovakia; Slovenia; Sweden; Switzerland; England and Wales, UK; and Ukraine), Asia (Hebei and Liaoning, China; Kyushu, Japan; and Korea Republic) and North America (New York and Pennsylvania, USA, and British Columbia, New Brunswick, Nova Scotia, Ontario, Prince Edward Island and Quebec, Canada).