Dobrich Province is a province in northeastern Bulgaria, part of Southern Dobruja geographical region. It is bounded on east by the Black Sea, on south by Varna Province, on west by Shumen and Silistra provinces, on the north by Romania. It is divided into 8 municipalities. At the 2011 census, it had a population of 186,016. The province was part of Romania between 1913 and 1940.

Varna Province, formerly known as Varna okrug, is a province in eastern Bulgaria, one of the 28 Bulgarian provinces. It comprises 12 municipalities with a population of 494,216 inhabitants as of April 2016. The province is named after its administrative centre, Varna.