ng au ) ▁is ▁a ▁reg ency ▁in ▁West ▁Kal im ant an ▁province ▁of ▁Indones ia . ▁It ▁is ▁situated ▁in ▁the ▁north - central ▁part ▁of ▁the ▁province , ▁with ▁an ▁area ▁( since ▁the ▁separation ▁of ▁the ▁former ▁eastern ▁part ▁of ▁the ▁reg ency ▁in ▁ 2 0 0 3 ▁to ▁create ▁Se k ad au ▁Reg ency ) ▁of ▁ 1 2 , 8 5 7 . 8 0   km ² ▁and ▁a ▁population ▁of ▁ 4 0 8 , 4 6 8 ▁at ▁the ▁ 2 0 1 0 ▁Census ; ▁the ▁latest ▁official ▁estimate ▁( for ▁January ▁ 2 0 1 4 ) ▁is ▁ 4 2 2 , 4 4 8 . ▁Al ong side ▁Land ak ▁Reg ency , ▁Se k ad au ▁Reg ency , ▁and ▁Sint ang ▁Reg ency , ▁Sang g au ▁is ▁one ▁of ▁the ▁four ▁West ▁Kal im ant an ▁reg encies ▁that ▁are ▁pre domin antly ▁Catholic . ▁ ▁Administr ative ▁District s ▁▁ ▁Sang g au ▁Reg ency ▁consists ▁of ▁fifteen ▁districts ▁( ke cam atan ), ▁tab ulated ▁below ▁with ▁their ▁populations ▁at ▁the ▁ 2 0 1 0 ▁Census ▁and ▁their ▁administrative ▁cent res : ▁ ▁Eth n ical ▁population ▁statistics ▁▁ ▁Day ak ▁B iday uh , ▁in ▁k ec am atan ▁( d istrict ) ▁of ▁K emb ay an , ▁No yan , ▁Se k ay am ▁and ▁J ang k ang ▁ ▁Day ak ▁M ali , ▁in ▁k ec am