The Biysk constituency (No.41[a]) is a Russian legislative constituency in Altai Krai.

Currently the constituency covers northwestern corner of Altai Krai, including industrial cities of Biysk and Zarinsk as well as Okyabrsky District of Barnaul and its satellite city Novoaltaysk.

The constituency has been vacant since June 25, 2024, following the resignation of three-term United Russia deputy Aleksandr Prokopyev, who was appointed Deputy Chairman of the Government – Minister of Economy of the Altai Republic.

1993–2007: Altaysky District, Biysk, Biysky District, Krasnogorsky District, Kytmanovsky District, Novoaltaysk, Pervomaysky District, ZATO Sibirsky, Soltonsky District, Sovetsky District, Talmensky District, Togulsky District, Tselinny District, Yeltsovsky District, Zalesovsky District, Zarinsk, Zarinsky District[2][3][4] The constituency covered eastern Altai Krai, stretching from Barnaul northern and eastern suburbs and the satellite city of Novoaltaysk south to industrial city of Biysk.

2016–present: Barnaul (Oktyabrsky), Biysk, Kosikhinsky District, Kytmanovsky District, Novoaltaysk, Pervomaysky District, ZATO Sibirsky, Togulsky District, Troitsky District, Tselinny District, Yeltsovsky District, Zalesovsky District, Zarinsk, Zarinsky District, Zonalny District[5] The constituency was re-created for the 2016 election and in its new configuration it took Oktyabrsky District of Barnaul itself but shedded rural areas to the south of Biysk to Barnaul constituency.