Udbina is a settlement and a municipality in historical Krbava, in the Lika region of Croatia. Administratively, it is part of the Lika-Senj County. …Udbina is a settlement and a municipality in historical Krbava, in the Lika region of Croatia. Administratively, it is part of the Lika-Senj County. Udbina is located in the large karst field called Krbava. It is approximately 45 kilometres from Gospić, the county capital and nearest sizeable town. The field has a small airport, the only one in Lika.