Rainier is located in Columbia County, OR. The population is 1,807, making Rainier the 5th largest city in Columbia County.
There are 3 public schools in Rainier with an average Homefacts rating of C-. The total crime rate for Rainier is low , and there are 5 registered sex offenders residing in the city. Unemployment in Rainier is very high and the median home sales price is $0. Detailed and up-to-date Rainier property reports are available for any property address.