Polling will take place between the hours of 7am and 10pm on 3 September 2026 for the election of one councillor for electoral ward 15 Southside / Newington as there are more validly nominated candidates than the number of councillors to be elected. The validly nominated candidates are:
- Elliott, Ruth - Scottish Labour Party
- Emms, Derrick - Edinburgh & East Lothian People
- Gastel Alejandre, Isabella - Scottish Greens
- Keirdashian, Roisin - Independent
- Khovanov, Artie - Scottish Liberal Democrats
- Layden, Nick - Scottish Conservative and Unionist
- Lucas, Richard Crewe - Scottish Family Party – Christian Values
- Mackenzie, Sam Alexander - Scottish National Party (SNP)
- Moffat, Sean McGregor - Alliance for Democracy and Freedom
- Neill, Gary - Reform UK
- Rowbotham, Markham - Edinburgh & East Lothian People
- Shillcock, Richard - Communist Party of Britain
- Wilkinson, Marc - Edinburgh & East Lothian People