Countryside is a city located in the Virginia region of the United States. During the most recent census, Countryside had a population of 10,072. Countryside is the 97th most poplulated city in the Virginia region, the 3,948th most populated city in the United States and the 21,011th most populated city in the world. Countryside is in the America/New York timezone which is 4 hours behind UTC. Countryside adjusts the hour with daylight savings time during the winter months.