Hartwick, IA has a population of 98 and is the 26,999th largest city in the United States. The population density is 732 per sq mi which is 1240% higher than the Iowa average and 708% higher than the national average. The median age in Hartwick is 35 which is approximately 8% lower than the Iowa average of 38. In Hartwick, 75% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 87% of Hartwick residents were born in Iowa, 11% were born out of state, 2% were born outside of the United States and 0% were foreign born.
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The population density in Hartwick is 1240% higher than Iowa.
The median age in Hartwick is 8% lower than Iowa.
In Hartwick 94.90% of the population is White.
In Hartwick 0.00% of the population is Black or African American.