He got 69,307 votes to secure another four-year term in Parliament.
Mr Iddrisu beat the governing New Patriotic Party’s Yakubu Yussif, who polled 23, 417.
The other candidates include the Convention People’s Party’s Kassim Abdul Jalilu (542) and Imoro Nabila Sualisu (731).
Mr Iddrisu dedicated his “victory to the chiefs and people of Tamale South” and assured them that “I will continue to reflect and mirror their needs and aspirations as an advocate, for an improvement in their quality of life, as a people and advocate improved infrastructure for them”.
Click here to follow our Ghana Election Page for all the figures and results from the constituencies.
You can also click here to follow our livestream of Election Desk for all the press conferences, updates and interviews on the elections.