Updates from BBC correspondents on the ground: Emmanuel Igunza in Eldoret, Roncliffe Odit in Kisumu, Aboubakar Famau in Mombasa, David Wafula in Nakuru, Anne Ngugi in Nyeri, Hassan Gelle in Wajir, Richard Kagoe in Kiambu county, Anne Soy, Dickens Olewe, Mercy Juma & Farah Lamane in Nairobi.
It is buzzing in Kisumu – the stronghold of Kenyan presidential frontrunner Raila Odinga – as voters continue to throng polling centres to cast their ballots.
His supporters have been going around the town blowing whistles and vuvuzelas since 04:00 local time, two hours before polls opened, reminding people to vote – a tactic encouraged by Mr Odinga, dubbing it the “firimbi (whistle in Swahili) movement”.
Businesses are also closed here and there is a sense of expectation in the air..
The region has supported Mr Odinga’s four previous presidential bids and now sees the prospect of an Odinga presidency in its sights.
No major hitches have been reported in Kisumu and its environs so far, with electoral officials exuding confidence that the process will be free and fair.
Polls close at 17:00 local time (14:00 GMT) and vote counting will start immediately afterwards.