Look up marchioness in Wiktionary, the free dictionary.
A marchioness (marquise) is a noblewoman with the rank of marquess (marquis), or the wife of a marquess.
Marchioness may also refer to:
- Marchioness (ship), a brigantine which sailed between Nelson, New Zealand and Melbourne, Australia in the 1850s
- Marchioness disaster, the 1989 disaster that struck The Marchioness, a pleasure boat on the River Thames