Its current archbishop is Cardinal William Goh Seng Chye.

Goh took over the archdiocese on 18 May 2013, after Pope Francis accepted the resignation of his predecessor, Nicholas Chia Yeck Joo.

As an exempt diocese, the archdiocese is not a part of an ecclesiastical province, but comes under the direct jurisdiction of the Holy See.

The archdiocese is a member of the Catholic Bishops' Conference of Malaysia, Singapore and Brunei.

From 1838 to 1981, there was dual jurisdiction situation in Singapore, one tracing authority from the Vicariate Apostolate of Siam down to the present Archdiocese of Singapore and the other with the authority from the Portuguese Mission first from the Archdiocese of Goa and then the Diocese of Macau.