Grottoes, VA has a population of 2,751 and is the 9,246th largest city in the United States. The population density is 1,346 per sq mi which is 603% higher than the Virginia average and 1386% higher than the national average. The median age in Grottoes is 41 which is approximately 8% higher than the Virginia average of 38. In Grottoes, 62% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 73% of Grottoes residents were born in Virginia, 23% were born out of state, 0% were born outside of the United States and 3% were foreign born.