Newark, IL has a population of 1,139 and is the 14,356th largest city in the United States. The population density is 1,017 per sq mi which is 357% higher than the Illinois average and 1022% higher than the national average. The median age in Newark is 34 which is approximately 9% lower than the Illinois average of 37. In Newark, 63% of the population over 15 years of age are married, 91% speak English and 3% speak Spanish. 79% of Newark residents were born in Illinois, 15% were born out of state, 0% were born outside of the United States and 6% were foreign born.