Wendell is a city in southern Gooding County, Idaho, United States. The population was 2,782 at the 2010 census. According to the United St…Wendell is a city in southern Gooding County, Idaho, United States. The population was 2,782 at the 2010 census. According to the United States Census Bureau, the city has a total area of 1.36 square miles, all of it land.