Siloam Springs, AR has a population of 16,095 and is the 2,662nd largest city in the United States. The population density is 1,455 per sq mi which is 2524% higher than the Arkansas average and 1506% higher than the national average. The median age in Siloam Springs is 29 which is approximately 23% lower than the Arkansas average of 38. In Siloam Springs, 57% of the population over 15 years of age are married, 85% speak English and 13% speak Spanish. 40% of Siloam Springs residents were born in Arkansas, 47% were born out of state, 1% were born outside of the United States and 12% were foreign born.