October
- 2 October: Latvia, Parliament
- 3 October: Brazil, President (1st round) and Parliament
- 3 October: Bosnia and Herzegovina, President and Parliament
- 10 October: Kyrgyzstan, Parliament
- 15–16 October: Czech Republic, Senate (1st round) (a third)
- 22–23 October: Czech Republic, Senate (2nd round) (a third)
- 23 October: Bahrain, Parliament (1st round)
- 30 October: Bahrain, Parliament (2nd round)
- 31 October: Brazil, President (2nd round)
- 31 October: Côte d'Ivoire, President (1st round)
- 31 October: Niger, Constitutional referendum
- 31 October: Tanzania, President and Parliament
Read more about this topic: National Electoral Calendar 2010