Anninsky District  Anninsky District () is an administrative and municipal district (raion), one of the thirty-two in Voronezh Oblast, Russia. It is located in the north of the oblast. The area of the district is . Its administrative center is the urban locality (an urban-type settlement) of Anna. Population: 45,385 (2010 Census); The population of Anna accounts for 39.7% of the district's total population.