| Election Name: | 2021 Altai Krai Legislative Assembly election |
| Last Election3: | 8 seats, 21,01% |
| Leader1: | Sergey Shoygu |
| Candidate1: | Viktor Tomenko |
| Election Date: | 19 September 2021 |
| Seats1: | 31 |
| Next Year: | 2026 |
| Next Election: | 2026 Altai Krai Legislative Assembly election |
| Previous Year: | 2016 |
| Previous Election: | 2016 Altai Krai Legislative Assembly election |
| Ongoing: | no |
| Type: | legislative |
| Last Election1: | 42 seats, 34,08% |
| Seat Change1: | 11 seats |
| Seat Change2: | 5 seats |
| Country: | Altai Krai |
| Party3: | CPRF |
| Leader3: | Gennady Zyuganov |
| Candidate3: | Maria Prusakova |
| Seats2: | 4 |
| Last Election2: | 9 seats, 21,18% |
| Party2: | LDPR |
| Leader2: | Vladimir Zhirinovsky |
| Candidate2: | Vladimir Zhirinovsky |
| Party1: | United Russia |
| Seats3: | 24 |
| Seat Change4: | 1 seat |
| Party5: | Yabloko |
| Leader5: | Nikolay Rybakov |
| Candidate5: | Alexander Goncharenko |
| Seats4: | 5 seats |
| Last Election5: | 0 seat, 3,13% |
| Last Election4: | 6 seats, 17,41% |
| Party4: | SRZP |
| Leader4: | Sergey Mironov |
| Candidate4: | Aleksandr Terentyev |
| Seats5: | 0 seat |
| Seat Change3: | 16 seats |
| Seats6: | 4 seats |
| Seat Change6: | 4 seats |
| Party6: | CPCR |
| Leader6: | Maxim Suraykin |
| Candidate6: | Maxim Suraykin |
Altai Krai Legislative Assembly election was held in Altai Krai on 19 September 2021 along with State duma elections in Russia.
68 deputies are elected according to the mixed electoral system. 34 deputies are elected according to party lists (proportional representation) for which a 5% threshold is established, and the distribution of seats between lists that received more than 5% of the vote takes place according to the formula. The other 34 deputies are elected in single-mandate constituencies (plurality voting), won by the majority of votes. The term of office is five years.
As of July 1, 2021, 1 792 470 voters were registered in the Altai Krai.[1]
To register regional lists of candidates, parties need to collect voter signatures in the amount of 0.5%.
To register a candidate nominated in a single-mandate constituency, it is necessary to collect voter signatures in the amount of 3%.
The Election Commission of the Altai Territory published a list of 5 parties[2] with the right to nominate their candidates, without collecting:
| №[3] [4] | Party | Krai-wide Party-list | Candidatesin the list | Territorial groups | |
|---|---|---|---|---|---|
| 2 | United Russia | Victor Tomenko • Alexander Romanenko • Victor Zobnev | 164 | 34 | |
| 4 | Communist Party of the Russian Federation | Maria Prusakova • Anton Artsibashev • Andrey Krivov | 117 | 34 | |
| 3 | Liberal Democratic Party of Russia | Vladimir Zhirinovsky • Vladimir Semenov • Sergey Bulaev | 98 | 34 | |
| 5 | A Just Russia — For Truth | Alexander Terentyev • Lyudmila Suslova • Alexander Molotov | 156 | 34 | |
| 6 | Yabloko | Alexander Goncharenko | 57 | 27 | |
| 1 | Communists of Russia | Maxim Suraykin • Sergey Matasov • Sergey Malinkovich | 100 | 33 |