Of 44 counties in the Gem State, Oneida County ranks 26th by size (1,200 square miles). Oneida County is in Southeastern Idaho. Oneida County, Idaho, has roughly 1,000 acres of riverfront homes and property for sale based on recent Land Network data. The combined market value of farms and ranches for sale here was nearly $700,000. Browse all waterfront property for sale in Oneida County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Oneida County is undeveloped land.