The 117th Separate Territorial Defense Brigade () is a military formation of the Territorial Defense Forces of Ukraine in Sumy Oblast. It is part of Operational Command North.
On 13 April 2018, the brigade was formed in Sumy Oblast. Colonel Yurii Polous was the commander. During 27 September to 7 October, a ten-day exercise was held for a planned 25 percent of reserves.
On 3 December 2021, Colonel Serhii Kyrian was appointed as a new commander.
On 17 February 2022, the brigade was taking in more recruits.
In early March, soldiers of the brigade captured Russian â-90ÃÂ, T-72B3M obr.2016 tanks and UR-77 Meteorit mine clearing vehicle. In April, after the Russian withdrawal from northern Ukraine, soldiers of the brigade's 150th Battalion captured Russian tanks that had been abandoned near the RussiaâÂÂUkraine border.
On 27 August 2022, the brigade received its battle flag.
During the Pokrovsk offensive in 2024, the brigade came under the threat of encirclement.
The brigade participated in the Kursk offensive of 2024 to 2025.
As of 2022 the brigade's structure is as follows:
Emblem shows a silver Theotokos on a golden crescent, which was a part of Sumy Regiment flag during the Sloboda Ukraine.