Meridian, ID has a population of 88,247 and is the 370th largest city in the United States. The population density is 2,717 per sq mi which is 14138% higher than the Idaho average and 2899% higher than the national average. The median age in Meridian is 35 which is approximately 1% lower than the Idaho average of 36. In Meridian, 64% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 46% of Meridian residents were born in Idaho, 48% were born out of state, 1% were born outside of the United States and 6% were foreign born.