The incumbent Kwale Deputy Governor Fatuma Achani is now the county's governor-elect.
She was on Friday declared by the County Returning Officer Obadiah Kariuki at the Kenya School of Government's main tallying centre in the Matuga constituency.
Achani won the race after beating ODM candidate professor Hamadi Boga, Wiper's Chirau Ali Mwakwere, Gereza Dena (KANU), Lung'anzi Chai Mangale (PAA), and Sammy Ruwa (Independent).
She garnered 59,674 votes with Boga garnering 53, 972 votes.
Lung'anzi came in third place with 47, 301 votes.
Achani vied on the UDA party ticket after the outgoing governor Salim Mvurya fell out with ODM and Jubillee parties during their first and second terms.
In the senatorial position, Issa Boya of ODM maintained his seat by garnering 52, 772 votes.
He was followed by Antony Yama of UDA with 41, 762 votes and Mudzo Nzili 31,250. Salim Mwadumbo of ANC secured 16, 902 votes, and William Ndeti of DP had 9,236.
At least nine candidates vied for the senatorial seat.
Fatuma Masito of ODM was declared the new woman rep after garnering 58,820 votes.
Bibi Masha (UDA) was the first runners-up with 44,472 votes followed by Zainab Chitsangi (Independent) who had 35,633 votes.
“WATCH: The latest videos from the Star”