is one of three wards of the city of Shizuoka in Shizuoka Prefecture, Japan, located in the northern part of the city. Aoi-ku borders Suruga-ku in the south and Shimizu-ku to the southeast; the west faces Shimada, Fujieda and Kawanehon and its northern tip extends into the border between Nagano Prefecture and Yamanashi Prefecture. It is the largest ward in Japan in terms of geographic area.

Aoi-ku was created on April 1, 2003, when Shizuoka became a city designated by government ordinance (a "designated city"). It consists of the area of Shizuoka prior to its merger with Shimizu, north of the Tōkaidō Main Line rail tracks.

The ward is home to both the Shizuoka city offices as well as the Shizuoka prefectural offices.

Geography Climate Aoi-ku has a climate characterized by hot and humid summers, and relatively mild winters (Köppen climate classification Cfa). The average annual temperature in Aoi-ku is . The average annual rainfall is with September as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around .

Economy Vic Tokai has its headquarters in Aoi-ku."会社概要 ." Vic Tokai. Retrieved on November 19, 2010. "本社所在地 静岡県静岡市葵区常磐町2丁目6番地の8 TOKAIビル." Fuji Dream Airlines was headquartered in Aoi-ku;"会社概要." Fuji Dream Airlines. Retrieved on May 20, 2009. it now has its headquarters in Makinohara."会社概要." Fuji Dream Airlines. Retrieved on November 19, 2010. "〒421-0411 静岡県牧之原市坂口2053番地1."

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