Elizabeth Girls' College

Elizabeth Girls' College is a prestigious all-girls' high school in central Ikebukuro and is the school that Chiaki Igarashi attends.

Light novel
The school is first mentioned in the fifth light novel. After Chikage Rokujou tails Walker Yumasaki from the art gallery, he follows Kyouhei Kadota when the van gang splits paths. Kyouhei is aware of being followed, however, and turns to confront Chikage outside of the girls' school. Kyouhei makes a point to note that the location of their encounter is strange.

Video game
The school is mentioned in the Durarara!! 3way standoff game series when Chiaki meets Yoshimune Miyoshi during his first days in Ikebukuro.