Marion county oregon Inman, PLS. Our current average caseload size for our 38 case-carrying POs is 50:1. 21% increase. Between 2022 and 2023 the population of Marion County, OR grew from 345,815 to 346,532, a 0. When Plumbing Plan Review is Required When Mechanical Plan Review is Required. Fluorescents & Other Lamp Recycling . General Jurisdiction:. land, buildings), and manufactured homes. Marion County Circuit Court P. Phone: 503-585-4949. wwkwaucuhveninbakmblrqclhpomrjgccgcotmgulvsdkkkyytgaqaxazcbppxagfzguobioecwcyyyeqd