Udell is a city in Appanoose County, Iowa, United States. The population was 58 at the 2000 census. Geography Udell is located at (40.780199, -92.741393). According to the United States Census Bureau, the city has a total area of 0.3 square miles (0.8 km²), all of it land. Demographics As of the census of 2000, there were 58 people, 21 households, and 17 families residing in the city. The population density was 183.0 people per square mile (70.0/km²). There were 24 housing units at an average density of 75.7/sq mi (29.0/km²). The racial makeup of the city was 91.38% White, 3.45% Asian, 5.17% from other races. Hispanic or Latino of any race were 3.45% of the population. There were 21 households out of which 33.3% had children under the age of 18 living with them, 61.9% were married couples living together, 19.0% had a female householder with no husband present, and 19.0% were non-familie