For people from Haifa or Bet Shean to lead the prayers: Megillah 24b
Tiberian glass: Niddah 21a
The murder rate in Gilad: Makkot 9b-10a
The murder rate in Shechem: Makkot 10a
The people of Tiveria were hard workers: Eruvin 87b-88a
Rebbe enacted a law that the people of Geder could visit Chamtan, but not the reverse, on Shabbat, because the people of Chamtan would kill Gederites who visited them in Chamtan, where they felt powerful: Eruvin 61a