The supervisors directed the County Counsel's Office to review Jessica's Law, or Proposition 83, to determine options local government have to restrict the housing of sex offenders in neighborhoods.
"Right now, the state has the authority to place them basically anywhere and, as a result of a great outcry in the Altadena community ... we were able to mobilize the community, and the state has now removed the sexual predators from that neighborhood," Supervisor Michael D. Antonovich said.
"But we want to ensure there is no neighborhood in this county or state where sexual predators are allowed to roam and create a danger and threat to young people."
The vote follows a community effort late last month that led state officials to remove six sex offenders placed in an Altadena neighborhood.
Earlier in the month, a judge denied a request by a twice-convicted child molester from Santa Barbara to move to the county, possibly the Antelope Valley.
Those actions followed revelations late last year that about 660 convicted sex offenders were wandering free in California, not wearing the monitoring devices that Jessica's Law requires.
State corrections officials say they removed the satellite tracking devices from the sex offenders who had completed their parole, regardless of the lifetime monitoring requirement.
They argued that the law was too vague and wasn't clear on which authorities - state or local - would be responsible for monitoring them.
"The issue of finding sex offenders housing is one that is complex," California Department of Corrections spokesman Seth Unger said. "And at the state level, the Sex Offender Management Board is actively looking at this issue and making recommendations."
Jessica's Law, co-authored by Lancaster Republican husband-and-wife state legislators Sen. George Runner and Assemblywoman Sharon Runner and passed by voters in 2006, cracks down on sex offenders and sets distances they must live away from schools and parks.
The law includes a provision that authorizes local governments to include additional restricted sites they deem appropriate.
Last month, the city of Long Beach directed its city attorney to draft an ordinance restricting residency requirements of sex offenders in relation to licensed child-care facilities.
The city is also researching the possibility of limiting the number of sex offenders living in the same apartment complex.
The County Counsel's Office is expected to draft a legal analysis for the supervisors, exploring specific restrictions on where sex offenders can live, how they are monitored and an overview of group homes and licensing requirements.
The office will then make recommendations that may include a proposed ordinance similar to the one in Long Beach, along with other steps the county can take.