The constituency covered the areas of Bukit Batok, Choa Chu Kang, Upper Bukit Timah, Jurong West and Lim Chu Kang.
It was a huge constituency in terms of land area and covered the entire north-western region of Singapore and its territorial waters in the Straits of Johor.
Nanyang (Jurong West Neighbourhood 9) was given from Hong Kah West and Jurong SMC and Yew Tee (Choa Chu Kang N5-N7, Lim Chu Kang) was carved from Chua Chu Kang SMC.
In the 2011 Singapore general election, Hong Kah GRC was dissolved.
It was split into Hong Kah North of the constituency was carved out as a new Single-Member-Constituency while Bukit Gombak, Keat Hong, Nanyang and Yew Tee wards merged with then-Chua Chu Kang SMC to form the new Chua Chu Kang Group Representation Constituency and Gan Kim Yong took over the ministerial position.