Coalition casualties in Afghanistan

Throughout the War in Afghanistan, there had been 3,621 coalition deaths in Afghanistan as part of the coalition operations (Operation Enduring Freedom and ISAF) since the invasion in 2001. 3,485 of these deaths occurred during NATO's combat operations which ended in 2014, while the remainder of deaths happened afterwards until 2021.However there are some reports of greater estimates which range up to 7,500+ total deaths.

In addition to these numbers were the deaths of 18 CIA operatives, a number of American deaths that occurred in other countries from injuries sustained in the theater, and 62 Spanish soldiers returning from Afghanistan who died in Turkey on 26 May 2003, when their plane crashed.

During the first five years of the war, the vast majority of coalition deaths were American, but between 2006 and 2011, a significant proportion were amongst other nations, particularly the United Kingdom and Canada which had been assigned responsibility for the flashpoint provinces of Helmand and Kandahar, respectively. This is because in 2006, ISAF expanded its jurisdiction to the southern regions of Afghanistan which were previously under the direct authority of the U.S. military. The UK in particular suffered a high number of deaths relative to other countries, having been in charge of the highly hazardous Helmand region; both Denmark and Estonia, which were part of the British-led Task Force Helmand, also suffered high death rates, with Danish troops having the highest death rate of any country in the war as of 2009. In later years, Georgia became the largest non-NATO contributor to Afghanistan and paid a heavy toll with the highest casualty rate, with all of the 32 deaths occurring in Helmand.

As Robert Gates pointed out on 10 June 2011, in his "last policy speech" as U.S. Secretary of Defense, "more than 850 troops from non-U.S. NATO members have made the ultimate sacrifice in Afghanistan. For many allied nations these were the first military casualties they have taken since the end of the Second World War." Additionally, there have been 95 fatalities among troops from the non-NATO contributors to the coalition (Georgia, Australia, Sweden, New Zealand, Finland, Jordan, South Korea and Albania). By 2015 with the passing of operations to the Afghan National Security Forces, the number of coalition casualties dropped, however, the Afghan forces suffered as many as 45,000 fatalities between 2014 and 2019, and an estimated 69,095 total by the end of the war in August 2021.