Agia Anna (Greek: Αγία Άννα meaning Saint Anne) is a mountain village in the municipal unit of Oleni, Elis, Greece. In 2001 its population was 413. Agia Anna is built on the slopes of the hill Axofolia, a western spur of the Foloi plateau. In the village square, the elevation is 450 m, and the top of the hill is around 670 m. Agia Anna is 2 km northeast of Goumero, 4 km west of Klindia, 10 km southeast of Simopoulo and 10 km northeast of Karatoula. The area is forested, but suffered damage from the 2007 Greek forest fires.
The village Agia Anna was founded in a remote place during Ottoman rule, to hide from the Turks. The village is named after its church. In the first administrative division of independent Greece (1840), Agia Anna was part of the municipality of Lampeia. In 1912, Agia Anna became a part of the community of Benteni (now Pefki), and it became a separate community in 1913. In 1999 under the Capodistria plan, Agia Anna became a part of the municipality of Oleni.