Where Is Delaware? Location, Borders, and Key Facts

Delaware sits on the Atlantic coast of the Mid-Atlantic region of the United States.

• Borders: Maryland (west & south), Pennsylvania (north), New Jersey (northeast, across the Delaware River/Bay).
• Size: 2nd smallest state (after Rhode Island); 6th least populous.
• Capital: Dover.
• Largest city: Wilmington.
• Known for: Business-friendly laws, low taxes, headquarters of DuPont, Bank of America, and many Fortune 500 companies.

Despite its small footprint, Delaware plays an outsized role in U.S. corporate law and finance.