Irwin, ID has a population of 233 and is the 23,751st largest city in the United States. The population density is 94 per sq mi which is 394% higher than the Idaho average and 4% higher than the national average. The median age in Irwin is 55 which is approximately 53% higher than the Idaho average of 36. In Irwin, 68% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 41% of Irwin residents were born in Idaho, 56% were born out of state, 0% were born outside of the United States and 3% were foreign born.
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The population density in Irwin is 394% higher than Idaho.
The median age in Irwin is 53% higher than Idaho.
In Irwin 95.71% of the population is White.
In Irwin 0.00% of the population is Black or African American.