The Young Men's Christian Association (YMCA), sometimes regionally called the Y, is a worldwide organisation based in Geneva, Switzerland, with more than 64 million beneficiaries from 120 national associations.

During the Second World War the YMCA was involved in war work with displaced persons and refugees. They also established the War Prisoners Aid to support prisoners of war by providing sports equipment, musical instruments, art materials, radios, gramophones, eating utensils, and other items.