In February 2004 President John Agyekum Kufour named Blankson as the only candidate to contest the seat for Mayor of Accra.
In his acceptance speech, Blankson promised to improve revenue collection and sanitation with the view of transforming Accra into a world-class city.
[1] As mayor of Accra, Blankson embarked on decongestion exercises in various parts of the city to aid in the smooth flow of human and vehicular traffic.
[2] He also worked with commercial drivers to improve the general commuting experience by admonishing them to take their personal hygiene and city sanitation seriously.
[3] Blankson served as mayor from February 2004 to January 2009, when the National Democratic Congress led by Professor John Evans Atta Mills came into power.