Its official bird is the azure-winged magpie, its flower is the fringed orchid, and its tree is the Zelkova serrata.

During the 1964 Summer Olympics, the district of Karasuyama-machi in Setagaya was part of the athletics marathon and 50 km walk event.

[3] Notes: a – 4-chōme (33-ban to 39-ban) b – 1, 2, 3-chōme, 4-chōme (1-ban to 32-ban) c – 1, 2-chōme d – 3, 4-chōme On April 25, 2011, amid national concern over the safety of nuclear power triggered by the March 11 earthquake and Fukushima I nuclear accidents, former Social Democratic Party House of Representatives legislator Nobuto Hosaka was elected mayor on an anti-nuclear platform.

[4] Prior to becoming mayor, Hosaka was also well known for his staunch opposition of the death penalty[5] and his defense of Japan's Otaku culture.

The Tokyo Metropolitan Government Board of Education operates following senior high schools in Setagaya.