Oselna Glacier (Bulgarian: ледник Оселна, romanized: lednik Oselna, IPA: [ˈlɛdnik oˈsɛɫnɐ]) is the 4 km long in east-west direction and 1 km wide glacier on the west side of Havre Mountains in northern Alexander Island, Antarctica. The glacier is situated south of Pipkov Glacier and north of Manolov Glacier. It drains the southwest slopes of Simon Peak, flows southwestwards and enters Lazarev Bay north of Kamhi Point. The feature is named after the settlement of Oselna in Northwestern Bulgaria.