St. Clair–Superior boundaries are: E. 55th Street from Lake Erie south to Superior Avenue; Superior Avenue east to Martin Luther King Jr. Drive; Martin Luther King Jr. Drive north to Lake Erie.

[2] The neighborhood lacks access to Lake Erie and Gordon Park due to the presence of Interstate 90 and major railroad tracks.

[3] St. Clair–Superior was largely rural and sparsely populated until the 1880s and 1890s, when extensive construction of heavy industry and manufacturing plants occurred along the railroad tracks and the area north of St. Clair Avenue.

Large numbers of immigrant Slovenians and Lithuanians moved into the area to work in these plants.

[4] Eastern European immigrants brought with them a long beer-making tradition, and during the 1800s and early 1900s the St. Clair–Superior neighborhood was known as "the mecca of breweries in Cleveland.

[1] Connected to its Slovenian cultural roots, Cleveland Kurentovanje has been celebrated every year the weekend before Ash Wednesday since 2013.