Ōmiya is one of ten wards of the city of Saitama, in Saitama Prefecture, Japan, and is located in the northeastern part of the city. As of 1 March 2021, the ward had an estimated population of 119,298 and a population density of 9,300 persons per km². Its total area was 12.80 square kilometres (4.94 sq mi). Although Urawa-ku is the governmental center of Saitama City, Ōmiya-ku is the most active commercial and business centre in both Saitama City and Saitama Prefecture thanks to its transport infrastructure, especially railways connected at Ōmiya Station.

Urawa is one of ten wards of the city of Saitama, in Saitama Prefecture, Japan. Located in the northeast of the city, Urawa is the governmental center of Saitama and houses most of the city's administrative offices including the city hall, as well as the offices of Saitama Prefectural government. Also, there are several newspaper branch offices and three broadcasting stations.