Article 176 of the Constitution establishes the County Assembly which shall consist of members elected by the registered voters of the wards; each ward constituting a single member constituency, on the same day as a general election of Members of Parliament, being the second Tuesday in August, in every fifth year; the number of special seat members necessary to ensure that no more than two-thirds of the membership of the assembly are of the same gender; the number of members of marginalized groups, including persons with disabilities and the youth, prescribed by an Act of Parliament; and the Speaker, who is an ex officio member.

The County Assembly consists of the Speaker who is an ex officio member, 45 elected members representing 45 Wards and 18 nominated members of which 16 of the members are female thereby observing article 177 of the CoK 2010 on Membership of the County Assembly. The membership also includes members of marginalized groups, including persons with disabilities and the youth.