It was on the other side of the wall that was created when Timmy wished for a gender-separated world in the episode, "Love Struck!". The city was much cleaner than the men's city, Himmsdale, which lay on the other side of the wall. The decisions of the city were decided by a council of girls situated inside a stadium, but nothing could get done because they were all emotionally distraught from the men being ripped from their lives. The females were also upset when boys and men were taken out of their lives. All the females lived here.
The city is colored mostly pink, purple, and white, and has some resemblances to Ancient Rome but with more futuristic looking buildings.
After being humiliated by Trixie again, and chased around by Tootie, Timmy decides to get rid of the girls in his life by wishing them all "someplace else". All of the girls, including Wanda whom was granting the wish, immediately were poofed away into this Utopia.
Like the men in Himmsdale, the inhabitants of Hersdale soon found something missing in their lives which was love. After the "Girl-In" wall was torn down by Timmy, the inhabitants of Himmsdale and Hersdale fought each other until Cupid showed up and gave Timmy the tools he needed to fix this mess. Timmy uses the weapons he got to make girls and boys fall in love with each other again. Timmy then had Cosmo and Wanda undo the wish that caused this mess.
- Vicky the Babysitter - Council Member - Outburst Control
- Mrs. Turner - Council Member
- Trixie Tang - Council Member
- Veronica - Council Member
- Tootie - Council Member (Book version)
- Geraldine Waxelplax - Council Member
- Mama Cosma
- All the other females.