Zagnanado [za.ɲɑ̃.na.do] or Zangnanado [zɑ̃.ɲɑ̃.na.do] is a town, arrondissement, and commune in the Zou Department of southern-central Benin.

Guézo made the area headquarters of the army during his campaigns against the Yoruba and Kétou of Abeokuta.

[2] By the Act of June 21, 1895, King Agoli-Agbo, he authorised full authority over the Agonlin region.

In the early twentieth century, Zagnanado and surrounding villages were visited by many missionaries who spread Christianity.

Zagnanado is bordered by Dassa-Zoumè to the north, Ouinhi and Zogbodomè to the south, Covè, Za-Kpota and Djidja to the west and Adja-Ouèrè and Kétou to the east.