| Election Name: | 2021 Tiszaújváros by-election |
| Swing2: | 14,63% |
| Popular Vote2: | 16,213 |
| Map Size: | 250px |
| MP | |
| Before Election: | Ferenc Koncz |
| Before Party: | Fidesz |
| After Election: | Zsófia Koncz |
| Percentage2: | 46,27% |
| Last Election2: | 31,64% |
| Type: | parliamentary |
| Election Date: | 11 October 2020 |
| Seats For Election: | Tiszaújváros constituency |
| Turnout: | 45,51% |
| Ongoing: | no |
| Previous Election: | 2018 Hungarian parliamentary election |
| Previous Year: | 2018 |
| Next Election: | 2022 Hungarian parliamentary election |
| Next Year: | 2022 |
| Party2: | Jobbik |
| Party1: | Fidesz-KDNP |
| Last Election1: | 49.3% |
| Popular Vote1: | 17,700 |
| Percentage1: | 50,51% |
| Swing1: | 1.18% |
| Candidate2: | László Bíró |
| After Party: | Fidesz |
The 2020 by-elections in Tiszaújváros were held on 11 October 2020 in Borsod-Abaúj-Zemplén County No. 6. in the individual constituency of the Parliament.[1] The election had to be called due to the death of Ferenc Koncz, a Member of Parliament in the constituency.[2]
The main stake in the election was whether the Fidesz could maintain a two-thirds majority in the parliament. Until the death of Ferenc Koncz, the Fidesz–KDNP coalition had 133 members - 66.8 percent of all members - in the 199-member Parliament, and thus the loss of a single member would have meant that the governing coalition would not have been able to pass key laws without opposition members. (In practice, this is of little significance because three members of the Our Homeland Movement outside the governing coalition and Imre Ritter, a German national, would had a good chance of voting with the Fidesz–KDNP.) [3]
Zsófia Koncz, the daughter of the deceased, ran in the elections as a candidate for Fidesz–KDNP, and Ádám Tóth and Gábor Váradi ran as independent. The party coalition called "opposition coalition" supported László Bíró of Jobbik. Erika Bukta Sóváriné is a candidate for the Democratic Party. The registration of the independent István Medve was rejected by the election committee because it failed to collect 500 valid signatures on the recommendation forms.[4] [5] [6]
In the end, Zsófia Koncz won the election by a slim, but increased four percent majority.[7]