Ucon, ID has a population of 1,251 and is the 13,771st largest city in the United States. The population density is 1,564 per sq mi which is 8096% higher than the Idaho average and 1626% higher than the national average. The median age in Ucon is 27 which is approximately 25% lower than the Idaho average of 36. In Ucon, 64% of the population over 15 years of age are married, 91% speak English and 8% speak Spanish. 73% of Ucon residents were born in Idaho, 23% were born out of state, 0% were born outside of the United States and 3% were foreign born.