Bivalve, MD has a population of 381 and is the 21,144th largest city in the United States. The population density is 290 per sq mi which is 39% lower than the Maryland average and 221% higher than the national average. The median age in Bivalve is 29 which is approximately 24% lower than the Maryland average of 38. In Bivalve, 90% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 92% of Bivalve residents were born in Maryland, 4% were born out of state, 4% were born outside of the United States and 0% were foreign born.