Tvarditsa Municipality

Tvarditsa Municipality (Община Твърдица) is a municipality in the Sliven Province of Bulgaria.

Demography
At the 2011 census, the population of Tvarditsa was 13,804. Most of the inhabitants were Bulgarians (67.79%) with a minority of Turks (9.32%) and Gypsies/Romani (15.21%). 7.07% of the population's ethnicity was unknown.

Villages
In addition to the capital town of Tvarditsa, there are 9 villages in the municipality:
 * Bliznets
 * Borov Dol
 * Byala Palanka
 * Zhalt Bryag
 * Orizari
 * Sborishte
 * Sartsevo
 * Chervenakovo
 * Shivachevo