Big Island is a census-designated place (CDP) in northern Bedford County, Virginia, United States.

[1] According to the United States Census Bureau, the CDP has a total area of 0.830 square miles (2.15 km²).

The racial makeup of the CDP was 268 White people, 19 African American or Black, and 12 from two or more races.

[1] The United States Postal Service operates the Big Island Post Office within the CDP.

Law enforcement is provided by the Bedford County Sheriffs Office and Virginia State Police.