Of five counties in the Rainbow State, Kauai County ranks fourth by size (1,266 square miles). Kauai County is in Kauai Hawaii. Hawaii's Kauai County includes 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farmsand rural real estate for sale here was almost $28 million. Browse all Kauai County farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future commercial or lifestyle needs. The most common type of land for sale by combined acreage in Kauai County is residential property.