Williamson, IA has a population of 113 and is the 26,584th largest city in the United States. The population density is 352 per sq mi which is 544% higher than the Iowa average and 288% higher than the national average. The median age in Williamson is 48 which is approximately 25% higher than the Iowa average of 38. In Williamson, 63% of the population over 15 years of age are married, 80% speak English and 0% speak Spanish. 88% of Williamson residents were born in Iowa, 4% were born out of state, 0% were born outside of the United States and 8% were foreign born.
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The population density in Williamson is 544% higher than Iowa.
The median age in Williamson is 25% higher than Iowa.
In Williamson 100.00% of the population is White.
In Williamson 0.00% of the population is Black or African American.