ʻŌmaʻo is a census-designated place in Kauaʻi County, Hawaiʻi, United States. The population was 1,346 at the 2020 census. ʻŌmaʻo is located on the south side of the island of Kauai at 21°55′11″N 159°28′54″W / 21.91972°N 159.48167°W. It is bordered to the west by Lawai and to the southeast by Koloa. Hawaii Route 50 passes through the north side o…ʻŌmaʻo is a census-designated place in Kauaʻi County, Hawaiʻi, United States. The population was 1,346 at the 2020 census. ʻŌmaʻo is located on the south side of the island of Kauai at 21°55′11″N 159°28′54″W / 21.91972°N 159.48167°W. It is bordered to the west by Lawai and to the southeast by Koloa. Hawaii Route 50 passes through the north side of the community, leading northeast 9 miles to Lihue and west 8 miles to Hanapepe.