Two million children out of school and another 3.7 million are at risk of dropping out at the start of the school year, UNICEF Representative in Yemen Sara Beslo Nyanti said.
Conflict, delayed development and poverty deprived millions of children of their right to education, and violence, displacement and attacks on teachers prevented many children from attending school.
The failure of children to attend school leaves them exposed to innumerable risks, including being forced to join fighting, child labor and early marriage, Nyanti said in the statement.
In 2016, teachers' salaries were suspended after the war led to the collapse of the economy. In the past academic year, UNICEF has provided cash incentives to more than 127 teachers and school staff, the organization said.
The war has left about 10,000 dead and more than 56,000 wounded since 2015, according to the World Health Organization, but a number of humanitarian officials believe the actual toll is much higher.