St. Olaf, IA has a population of 138 and is the 25,969th largest city in the United States. The population density is 565 per sq mi which is 935% higher than the Iowa average and 524% higher than the national average. The median age in St. Olaf is 26 which is approximately 31% lower than the Iowa average of 38. In St. Olaf, 53% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 72% of St. Olaf residents were born in Iowa, 27% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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The population density in St. Olaf is 935% higher than Iowa.
The median age in St. Olaf is 31% lower than Iowa.
In St. Olaf 98.55% of the population is White.
In St. Olaf 0.00% of the population is Black or African American.