The 35th Separate Marine Brigade named after Rear Admiral Mykhailo Ostrogradskyi (Ukrainian: 35-та окрема бригада морської піхоти імені контр-адмірала Михайла Остроградського, romanized: 35-ta okrema bryhada morskoi pikhoty imeni kontr-admirala Mykhaila Ostrohradskoho; unit number A0216), is a marine infantry brigade of the Ukrainian Marine Corps formed on 24 May 2018 in Dachne, Odesa Oblast.

This section needs expansion with: history prior to counteroffensive. You can help by adding to itadding to it or making an edit request. (June 2023)

During a 2022 Ukrainian counteroffensive in the Kherson Oblast, units of the 35th Brigade captured the village of Davydiv Brid on 4 October 2022.

The 35th Marine Brigade received international headlines for its participation in the 2023 Ukrainian counteroffensive. The unit has formed part of the spearhead on the Velyka Novosilka front alongside the 25th Airborne and 68th Jaeger brigades, as well as two units of Territorial Defense. The offensive has been described as a Thunder Run (referring to a similar strategy used by US personnel in the 2003 Battle of Baghdad) along the Mokri Yaly river.

Using these tactics, the 2,000 man strong brigade punched a hole in Russian lines liberating the village of Makarivka. Later the unit posted photos of its troops raising the Ukrainian flag over, and then posing in front of the municipal building of the village of Storozheve.

Together with the 38th Separate Marine Brigade, they liberated the village of Urozhaine on 16 August 2023.