The Tidewater region of Virginia is a term used to refer to the eastern portion of the Commonwealth of Virginia. The term "Tidewater" may be correctly applied to all portions of Virginia where the water level is affected by the tides. In general, this is most of the land east of I-95, which runs between major cities along the fall line, and north of U.S. 460. It includes Hampton Roads, the rest of the Virginia Peninsula, the Middle Peninsula, the Northern Neck, and the Eastern Shore. Most people of the southeastern area of Virginia refer to Tidewater as the areas of Va.Beach, Chesapeake, Portsmouth, Norfolk, Suffolk, Hampton, Newport News, James City County, Yorktown, Poquoson, Williamsburg , Gloucester.

The Piedmont region stretches from the falls of the Potomac, Rappahannock, and James Rivers to the Blue Ridge Mountains. The region is 50 miles wide, more or less, and 100 miles in length. At its northern corners are the major cities of Washington, D.C., and Harpers Ferry, West Virginia; on the southern corners, Charlottesville and Richmond, Virginia. It encompasses the counties of Loudoun, Fauquier, Prince William, Culpeper, Madison, Greene, Orange, Louisa, Albemarle and Fluvanna in Virginia.

This region lies in between the Blue Ridge region and the West Virginia/Virginia border, with the Cumberland Plateau to the southwest.

This region lies between the Piedmont region and the Ridge & Valley region, and includes the Blue Ridge Mountains and the immediate surrounding area.