Kirkland, IL has a population of 1,662 and is the 12,107th largest city in the United States. The population density is 1,356 per sq mi which is 510% higher than the Illinois average and 1396% higher than the national average. The median age in Kirkland is 30 which is approximately 19% lower than the Illinois average of 37. In Kirkland, 58% of the population over 15 years of age are married, 92% speak English and 7% speak Spanish. 79% of Kirkland residents were born in Illinois, 15% were born out of state, 1% were born outside of the United States and 5% were foreign born.