Altmar is located in Oswego County, NY. The population is 346, making Altmar the 10th largest city in Oswego County.
There are 0 public schools in Altmar with an average Homefacts rating of NA. The total crime rate for Altmar is low , and there are 20 registered sex offenders residing in the city. Unemployment in Altmar is moderate and the median home sales price is $0. Detailed and up-to-date Altmar property reports are available for any property address.