Taishi may refer to:

Names

Taishi (surname), Chinese family name

Taishi (given name), Japanese given name

Ranks

Grand Preceptor, ancient Chinese top civilian position: taishi () in Chinese

Taishi, an alternate name of the Japanese Daijō-daijin

Taishi (Mongol title), a rank of Mongolian nobility

Places

Taishi Town (太石镇), town in Lintao County, Gansu, China

Taishi Township (太石乡), township in Kang County, Gansu, China

Taishi, Guangzhou, village in Guangdong, China

Taishi, Hyōgo, town in Hyōgo, Japan

Taishi, Osaka, town in Osaka, Japan

Taisi, Yunlin, also known as Taishi, township in Yunlin County, Taiwan

Historical eras

Taishi (太始, 96BC–93BC), an era name used by Emperor Wu of Han

Taishi (泰始, 265–274), an era name used by Emperor Wu of Jin

Taishi (泰始, 465–471), an era name used by Emperor Ming of Liu Song

Taishi (太始, 551–552), an era name used by Hou Jing

Taishi (太始, 818), or Taesi, an era name used by Gan of Balhae

Taishi