The title of this legal research is the effectiveness of the Public Service Division Civil
Registration In Kulon Progo Regency After Applicability of Act No. 25 of 2009 on the Public
Service. The purpose of this legal research is to determine the effectiveness of the public service
population and civil registration in Kulon Progo regency government after the enactment of Law
No. 25 of 2009 on the Public Service. The type of this legal research was empirical legal research.
The data source used was primary data as main data despite of secondary data used as supporting
data. Results of the study of law is the public service in the field of population and civil registration
in Kulon Progo have led to the effectiveness of public services, it is evidenced by the one-day
service, SIAK (Population Administration Information System) that facilitate and speed up the
administration of residence of the districts, the results survey of IKM (Community Satisfaction
Index), which is conducted every year by the department of population and civil registration Kulon
Progo with the results of the assessment of society qualify as "good", and SOP (Standard
Operating Procedure) and SPP (Standard Public Service) so as to realize the protection and
certainty the law for the public in the administration of public services in the field of population
and civil registration