Bull Valley, IL has a population of 1,213 and is the 13,958th largest city in the United States. The population density is 130 per sq mi which is 41% lower than the Illinois average and 44% higher than the national average. The median age in Bull Valley is 48 which is approximately 28% higher than the Illinois average of 37. In Bull Valley, 78% of the population over 15 years of age are married, 91% speak English and 5% speak Spanish. 71% of Bull Valley residents were born in Illinois, 23% were born out of state, 0% were born outside of the United States and 6% were foreign born.