Isabel, KS has a population of 98 and is the 26,961st largest city in the United States. The population density is 391 per sq mi which is 1016% higher than the Kansas average and 332% higher than the national average. The median age in Isabel is 54 which is approximately 49% higher than the Kansas average of 36. In Isabel, 79% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 69% of Isabel residents were born in Kansas, 31% were born out of state, 0% were born outside of the United States and 0% were foreign born.