Hader may refer to:

• Hađer, Croatia
• Hader, Minnesota, United States
• Hader, Quneitra Governorate, Syria

• Berta and Elmer Hader, American couple who illustrated and wrote children's books
• Bill Hader (born 1978), American actor, voice actor, comedian, producer and writer
• Denise Crosswhite Hader (born 1965), American politician
• Josef Hader (born 1962), Austrian comedian, actor, and writer
• Josh Hader (born 1994), American professional baseball pitcher

• Haeder, surname