|First Appearance:||Witches and Warlocks Are My Favorite Things|
|Last Appearance:||Samantha's Witchcraft Blows a Fuse|
|Portrayer:|| Nancy Andrews|
|Occupation:|| • School for Witches - Owner|
• Witch Certification Committee - Chair, (member since 1658, serving for 308 years as of 1966)
|Family:|| Enchantra (sister)|
Samantha Stephens (niece)
Tabitha Stephens (grand-niece)
Adam Stephens (grand-nephew)
Darrin Stephens (nephew-in-law)
|Relatives:|| Endora (unknown relation)|
Maurice (unknown relation)
Clara (unknown relation)
Grimalda (unknown relation)
Bertha (unknown relation)
Aunt Hagatha is Samantha Stephens' aunt. She chairs the committee that tests Tabitha's powers. She, her sister Enchantra, and Endora attempt to have Tabitha attend Hagatha's witch school, but Maurice stops them. She often babysits Tabitha. She studies Transcendental Meditation.
- It is unknown how Hagatha is related to Endora and others in Samantha's family. In the episode Endora Moves in for a Spell, Endora says she was an only child until Arthur was born. Since witches are immortal and live for thousands of years, it is possible that Samantha's aunts are many degrees removed from her.
- Reta Shaw wears the same dress when playing both Hagatha and Bertha.
- Nancy Andrews in The Trial and Error of Aunt Clara
- Diana Chesney in Speak the Truth
- Kay Elliot in Tabitha's Very Own Samantha
- Ysabel MacCloskey in Darrin Goes Ape and This Little Piggie
- Doreen McLean in The Battle of Burning Oak
- Reta Shaw in Witches and Warlocks Are My Favorite Things and Samantha's Witchcraft Blows a Fuse