Petrolia is located in Humboldt County, CA. The population is NR.
There are 3 public schools in Petrolia with an average Homefacts rating of C. The total crime rate for Petrolia is very low , and there are 0 registered sex offenders residing in the city. Unemployment in Petrolia is moderate and the median home sales price is $0. Detailed and up-to-date Petrolia property reports are available for any property address.