The 109th Independent Brigade of the Territorial Defense Forces (Ukrainian: 109-та окрема бригада територіальної оборони) is a military formation of the Territorial Defense Forces of Ukraine in Donetsk Oblast.

Battalions were stationed in Mariupol, Bakhmut, Pokrovsk, Kramatorsk, Marinka and Volnovakha.

[3] 104th Defense Battalion was made up of reservists from Bakhmut, Chasiv Yar, Kostiantynivka, Kramatorsk, Toretsk and Sloviansk.

From December to January 2023, the battalion was moved to Sumy Oblast to help protect the border.

[5] As of 2024, the brigade's structure is as follows:[3] Emblem shows a crossed silver spear with a sabre.