As a result of Spanish cultural influence , Manila is a predominantly Christian ( Catholic ) city . As of 2010 , Roman Catholics comprises 83 @.@ 5 % of the population , followed by adherents of the Philippine Independent Church ( 2 @.@ 4 % ) ; Iglesia ni Cristo ( 1 @.@ 9 % ) ; various Protestant churches ( 1 @.@ 8 % ) ; and Buddhists ( 1 @.@ 1 % ) . Members of Islam and other religions comprises the remaining 10 @.@ 4 % of the city 's population .