Silver Spring is an urbanized, unincorporated area in Montgomery County, Maryland, USA. After Baltimore and Columbia, Silver Spring is the third most populous Census Designated Place in Maryland. The boundaries of Silver Spring are differently defined by various governmental and business entities. In its most common definition, Silver Spring would be the second most populous 'city' in Maryland, after Baltimore. Silver Spring apartments for rent comparison page shows most up to date rent information on Silver Spring apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.