Jamie McGoldrick, from the Office for the Coordination of Humanitarian Affairs, said the figure is based on lists of victims gathered by health facilities and that the actual number might be higher.
The UN has previously reported that 4,200 civilians had been killed in the war.
The coalition waged an air campaign in March 2015 to restore the internationally recognised government that fled the country after Houthis seized the capital.
The conflict in Yemen has taken a devastating toll, particularly on the most vulnerable members of society: children.
Even before the outbreak of conflict in March 2015, Yemen faced challenges from widespread poverty, food insecurity and lack of health services. But now, with more than 3.2 million people displaced, food and fuel imports cut short and livelihoods destroyed, more than four in five Yemenis are in need of some kind of humanitarian assistance.
During the first year of the conflict, more than 900 children were killed, constituting one third of all civilian deaths. Thousands more are wasting away because of deprivations caused by the conflict. UNICEF estimates that 370,000 children in Yemen face severe malnutrition, while 2.2 million children need urgent humanitarian assistance to prevent a further deterioration in their nutritional status.
In addition to children casualties, nearly 2,000 schools in Yemen have been damaged or destroyed, or are being used for military purposes.
According to the latest statistics issued by the European Commission’s DG ECHO, the humanitarian situation is critical.
21.2 million people are in need of humanitarian assistance – that
represents 82 % of the population of Yemen;
14.1 million people need basic health care;
14.1 million people are in need of food aid;
7 million face emergency level food insecurity (famine);
2 million people have been internally displaced because of the conflict.