Known to exist in the year 1541, it officially became a town in 1825.  Apulco is closely associated with Nochistlan, and records before 1888 exist mainly via Nochistlan Parish, which is approximately 13 miles away from Apulco.  From 1888 onward, Apulco civil records can be found for this town.  Census records also from Nochistlan parish include the Pueblo of Apulco dating back to at least 1817. 

Apulco 1817 Padron link.  

Apulco 1846 padron (census) link.  

Nochistlan parish baptism, confirmation, marriage, and burial records.