Osei Kyei Mensah Bonsu

Osei was first elected into Parliament during the 1996 Ghanaian General Elections on the Ticket of the New Patriotic Party representing the Suame Constituency in the Ashanti Region of Ghana. He polled 47,455 votes out of the 64,394 valid votes cast representing 57.40% against Paul Yeboah an NDC member who polled 10,828 votes, Azong Alhassan a PNC member who polled 3,219 votes and Habiba Atta a CPP member who polled 2,892 votes.[5]

Osei was elected as the member of parliament for the Suame constituency of the Ashanti Region of Ghana in the 2004 Ghanaian general elections.[6][7] He won on the ticket of the New Patriotic Party.[6][7] His constituency was a part of the 36 parliamentary seats out of 39 seats won by the New Patriotic Party in that election for the Ashanti Region.[8] The New Patriotic Party won a majority total of 128 parliamentary seats out of 230 seats.[9] He was elected with 48,500 votes out of 59,039 total valid votes cast.[6][7] This was equivalent to 82.1% of total valid votes cast.[6][7] He was elected over Agonno Sampson Young of the People's National Convention, Paul Richard Kofi Yeboah of the National Democratic Congress and Frederick Antwi of the Convention People's Party.[6][7] These obtained 934, 8,448 and 1,157 votes respectively of total valid votes cast.[6][7] These were equivalent to 1.6%, 14.3% and 2% respectively of total valid votes cast.[6][7]

In 2008, he won the general elections on the ticket of the New Patriotic Party for the same constituency.[10][11] His constituency was part of the 34 parliamentary seats out of 39 seats won by the New Patriotic Party in that election for the Ashanti Region.[12] The New Patriotic Party won a minority total of 109 parliamentary seats out of 230 seats.[13] He was elected with 45,235 votes out of 57,765 total valid votes cast.[10][11] This was equivalent to 78.31% of total valid votes cast.[10][11] He was elected over David Osei Manu of the National Democratic Congress, Ameyaw Aboagye Peter of Democratic People's Party and Frederick Antwi-Nsiah of the Convention People’s Party.[10][11] These obtained 9,742, 2,409 and 379 votes respectively of the total valid votes cast.[10][11] These were equivalent to 37.59%, 5.43% and 1.28% respectively of the total votes cast.[10][11]

In 2012, he won the general elections on the ticket of the New Patriotic Party for the same constituency.[14][15] He was elected with 60,829 votes out of 76,852 total valid votes cast.[14] This was equivalent to 79.15% of total valid votes cast.[14][15] He was elected over Alidu Baba Dambasea of the National Democratic Congress, Solomon Nkrumah Appia Kubi of the Progressive People's Party, Adam Mohammed of the People's National Convention, Frederick Antwi-Nsiah of the Convention People's Party, Mavis Afriyie of the Democratic People's Party, Abena Nyarko of the National Democratic Party, Osei-Bempah Hayford and Paul Richard Kofi Yeboah both independent candidates.[14][15] These obtained 10,589, 434, 376, 220, 71, 194, 3,752 and 387 votes respectively of the total valid votes cast.[14][15] These were equivalent to 13.78%, 0.56%, 0.49%, 0.29%, 0.09%, 0.25%, 4.88% and 0.50% respectively of the total votes cast.[14][15] Whilst his party was in opposition he served as the minority leader of the Ghanaian parliament from 2013 to 2017.

He again contested the 2020 Ghanaian general election as the parliamentary candidate for the New Patriotic Party.

Hon. Osei Kyei Mensah Bonsu contested with four other which includes Dodoovi Francis of the National Democratic Congress , the Convention People's Party Sulemana Mohammed , All People Congress, Mohammed Mubarak and the Independent candidate.

At the end of the polls, the Incumbent Member of Parliament for Suame, Hon. Osei Kyei Mensah Bonsu won the seat again for the New Patriotic Party NPP with 57,095 votes representing 73.07% , the National Democratic Congress NDC candidate Dodoovi Francis gathered 9,312 votes representing 11.92% of total valid votes cast. While the Convention People's Party Sulemana Mohammed manage with 299 votes which means he gathered

0.38% of the total valid votes cast. All People Congress also had 213 votes making 0.27% of the total vote cast. Finally the Independent candidate George Prempeh also came second with 11,217 votes making of 14.26% .