Currently, the constituency has at least 62,386 registered voters who are expected to cast their ballots on March 4.
The constituency has five wards namely Namamali, Koyonzo, Mayoni, Kholera and Khalaba with a total of 116 polling stations will be used in all five wards.
Dr Joseph Amukoya became the first MP for Matungu after he won the 1997 parliamentary elections on a Kanu ticket.
But in 2002, Dr Amukoya lost to David Were who rode in National Rainbow Coalition (Narc) wave.
Were successfully defended the seat in 2007 and 2013 on two different party tickets.
He vied on the ODM ticket in 2007 and managed to secure the seat in 2013 as a Ford Kenya candidate.