Old Ironsides is usually applied as a nickname, and may refer to:
- Oliver Cromwell (1599–1658), English general, Lord Protector and politician whose nickname was "Old Ironsides"
- HMS Britannia, a 100-gun Royal Navy first rate ship-of-the-line active during the American Revolutionary War and the Napoleonic Wars
- USS Constitution, a 44-gun United States Navy frigate, still in commission
- 1st Armored Division, an armored division of the United States Army
The term may also apply to:
- Old Ironsides (album), an album by hip-hop duo Mars ILL
- Old Ironsides (film), a 1926 film directed by James Cruze and starring Wallace Beery
- Old Ironsides (locomotive), the first locomotive built by Matthias W. Baldwin
- "Old Ironsides" (poem), an 1830 poem written by Oliver Wendell Holmes, Sr. as a tribute to the USS Constitution
- Old Ironsides (VTA), a light rail station in Santa Clara California
- Norman Keith Collins (aka Sailor Jerry), "Old Ironsides" was his nickname on his radio show
disambiguation page lists articles associated with the title Old Ironsides.
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