Upper Saddle River, NJ has a population of 8,301 and is the 4,576th largest city in the United States. The population density is 1,580 per sq mi which is 157928% higher than the New Jersey average and 1644% higher than the national average. The median age in Upper Saddle River is 40 which is approximately 2% higher than the New Jersey average of 40. In Upper Saddle River, 71% of the population over 15 years of age are married, 74% speak English and 4% speak Spanish. 50% of Upper Saddle River residents were born in New Jersey, 32% were born out of state, 0% were born outside of the United States and 17% were foreign born.