Raila Odinga-led Orange Democratic Movement (ODM) is the most popular party in Nairobi, Infotrak Research has said.
In poll results released on Wednesday, ODM is the most popular with 51 per cent, while Deputy President William Ruto's United Democratic Alliance (UDA) is at 31 per cent.
President Uhuru Kenyatta's Jubilee Party came in third at 8 per cent followed by Kalonzo Musyoka's Wiper party whose popularity is at 6 per cent.
George Wajackoyah's Roots party is at one per cent together with Musalia Mudavadi 's Alliance National Congress Party.
The survey's margin of error was plus or minus three.
A total of 1,024 residents were interviewed between 2-3 July across all the 17 sub-counties
