▁Center ▁region ▁of ▁the ▁state . ▁This ▁is ▁the ▁second ▁most ▁popul ous ▁met ro ▁area ▁in ▁Mexico ▁after ▁that ▁of ▁Mexico ▁City . ▁Six ▁of ▁the ▁municipal ities ▁are ▁considered ▁to ▁be ▁the ▁area ' s ▁nucle us : ▁Gu adal aj ara , ▁El ▁Sal to , ▁T la j om ul co ▁de ▁Z ú ñ iga , ▁T la que pa que , ▁T onal á ▁and ▁Z ap op an , ▁with ▁two ▁others , ▁Juan ac at lán ▁and ▁I xt la hu ac án ▁de ▁los ▁Mem br ill os ▁as ▁sub ur bs . ▁These ▁municipal ities ▁extend ▁over ▁an ▁area ▁of ▁ ▁with ▁a ▁population ▁density ▁of ▁ 1 3 3 . 2 ▁inhabitants ▁per ▁hect are ▁( 2 0 0 5 ). ▁The ▁most ▁highly ▁concentr ated ▁municipality ▁in ▁the ▁zone ▁is ▁the ▁municipality ▁of ▁Gu adal aj ara , ▁followed ▁by ▁Z ap op an . ▁ ▁The ▁state ▁as ▁a ▁whole ▁consists ▁of ▁ 1 2 5 ▁municipal ities ▁which ▁were ▁organized ▁into ▁twelve ▁administrative ▁regions ▁in ▁ 1 9 9 6 : ▁ ▁Alt os ▁Norte ▁has ▁eight ▁municipal ities : ▁Villa ▁H idal go , ▁Un ión ▁de ▁San ▁Antonio , ▁Te oc alt iche , ▁San ▁Juan ▁de ▁los ▁Lag os , ▁San ▁Diego ▁de ▁Ale j and ría , ▁O j uel os ▁de ▁J alis co , ▁Lag os ▁de ▁Mor eno ▁and ▁En car na ción ▁de ▁Dí az . ▁ ▁Alt os ▁Sur ▁consists