Hadar may refer to:

• Beta Centauri, a star
• Hadar (narrowboat), a working narrow boat on UK canals

• Hadar, Ethiopia
• Hadar HaCarmel, Haifa, Israel
• Hadar, Hod HaSharon, Israel
• Tell Hadar, an archaeological site on the eastern coast of the Sea of Galilee
• Hadar, Iran (disambiguation)
• Hadar, Nebraska, US
• Hader, Quneitra Governorate, Syria, also spelt Hadar

• Hadar (name)

• Hadar, a Jewish egalitarian educational institution that broke off from the Conservative movement

• Hadad (Bible), several biblical characters, also known as Hadar