Many entities have provided or promised military aid to Ukraine during the Russo-Ukrainian War, particularly since the 2022 Russian invasion of Ukraine. This includes weaponry, equipment, training, logistical support as well as financial support, unless earmarked for humanitarian purposes. Weapons sent as a result of cooperation between multiple countries are listed separately under each country.
The aid has mostly been co-ordinated through the Ukraine Defense Contact Group, whose 57 member countries include all 32 member states of NATO. The European Union co-ordinated weapons supplies through its institutions for the first time. Because of the invasion, some donor countries, such as Germany and Sweden, overturned policies against providing offensive military aid.
By March 2024, mostly Western governments had pledged more than $380 billion worth of aid to Ukraine since the invasion, including nearly $118 billion in direct military aid from individual countries. European countries have provided €132 billion in aid (military, financial and humanitarian) as of December 2024, and the United States has provided €114 billion. Most of the US funding supports American industries who produce weapons and military equipment.
Fearing escalation, NATO states have hesitated to provide heavier and more advanced weapons to Ukraine, or have imposed limits such as forbidding Ukraine to use them to strike inside Russia. Since June 2024, they have lifted some of these restrictions, allowing Ukraine to strike Russian military targets near the border in self-defense.
According to defense expert Malcolm Chalmers, at the beginning of 2025 the US provided 20% of all military equipment Ukraine was using, with 25% provided by Europe and 55% produced by Ukraine. However, the 20% supplied by the US "is the most lethal and important."