Old St. Johns County Jail

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Old St. Johns County Jail
U.S. National Register of Historic Places
Location	St. Augustine, Florida
Coordinates	29°54′28″N 81°19′8″W / 29.90778°N 81.31889°W / 29.90778; -81.31889
Architectural style	Romanesque Revival
NRHP reference No.	87001427[1]
Added to NRHP	August 27, 1987

The Old Jail (also known as Authentic Old Jail) is a historic jail in St. Augustine, Florida, United States. It is located at 167 San Marco Avenue. On August 27, 1987, it was added to the U.S. National Register of Historic Places. The St. Johns County Jail now serves as the Old Jail Museum.