The 2025 Legislative Assembly of Novosibirsk Oblast election will take place on 14 September 2025.

38 seats are elected by party-list proportional representation with a 5% electoral threshold, with the other half elected in 38 single-member constituencies by first-past-the-post voting.

Seats in the proportional part are allocated using the Imperiali quota, modified to ensure that every party list, which passes the threshold, receives at least one mandate.

[1] To register regional lists of candidates, parties need to collect 0.5% of signatures of all registered voters in Novosibirsk Oblast.

The following parties were relieved from the necessity to collect signatures:[2] 38 single-mandate constituencies were formed in Novosibirsk Oblast.