Ider may refer to:
Places
- Ider, Iran (disambiguation), places in Iran
- Ider, Zavkhan, a sum and small town in Mongolia
- Ider, Alabama, United States
Music
- Ider (band), an English singer-songwriter duo
Organizations
- Human Values and Mental Health Foundation (İnsani Değerler ve Ruh Sağlığı Vakfı; İDER), Turkey