Taihaku-ku (太白区) is the southernmost ward of the city Sendai, in Miyagi Prefecture, Japan. As of 1 March 2023, the ward had a population of 234,391 and a population density of 1028 persons per km2 in 113,068 households. The total area of the ward was 228.39 square kilometres (88.18 sq mi). Taihaku-ku is eleventh largest ward in Japan in terms of area, and second-largest in Sendai. The western portion of the ward is the former town of Akiu, Miyagi.

Sendai is the capital city of Miyagi Prefecture, the largest city in the Tōhoku region. As of 1 August 2023, the city had a population of 1,098,335 in 539,698 households, and is one of Japan's 20 designated cities. The city was founded in 1600 by the daimyō Date Masamune. It is nicknamed the City of Trees ; there are Japanese zelkova trees lining many of the main thoroughfares such as Jōzenji Street and Aoba Street . In the summer, the Sendai Tanabata Festival, the largest Tanabata festival in Japan, is held. In winter, the trees are decorated with thousands of lights for the Pageant of Starlight , lasting through most of December. The city is also home to Tohoku University, consistently ranked amongst the top institutions of higher education in Japan. On 11 March 2011, coastal areas of the city suffered catastrophic damage from a magnitude 9.0 offshore earthquake, which triggered a destructive tsunami.