There are 62 titles associated with this person.

Owenson, Sydney. St. Clair; or, The Heiress of Desmond. By S. O. Dublin: Patrick Wogan [23 Old Bridge], John Halpen (also Halpin) [Sackville Street], Harriet Colbert [136 Capel Street], Thomas Jackson [Sackville Street], Jon Dornin, Medcalf, Charles Brown, 1803.
Owenson, Sydney. St. Clair; or, The Heiress of Desmond. By S. O. London: Samuel Highley [24 Fleet], Edward Harding [98 Pall Mall], John Archer [Commercial Buildings, Dame Street], 1803.
Owenson, Sydney and Thomas Charles Morgan. France. By Lady Morgan. London: Henry Colburn [Conduit Street], 1817.
Owenson, Sydney and Thomas Charles Morgan. La France; Par Lady Morgan, Ci-Devant Miss Owenson. Paris: Treuttel and Wurtz, Treuttel and Wurtz, 1817.
Owenson, Sydney and Thomas Charles Morgan. France. By Lady Morgan. Fourth Edition. London: Henry Colburn [Conduit Street], 1818.
Owenson, Sydney and Thomas Charles Morgan. Italy by Lady Morgan. Paris: A. and W. Galignani, 1821.
Owenson, Sydney and Thomas Charles Morgan. Italy by Lady Morgan. In Two Volumes. London: Henry Colburn [Conduit Street], 1821.
Owenson, Sydney and Thomas Charles Morgan. Italy, by Lady Morgan. In Two Volumes. New York City: Cornelius S. Van Winkle, M. Carey and Son, Wells and Lilly, Collins and Co. [New York], Halsted, Bliss and White, Evert Duyckinck [Water Street], Samuel Wood and Sons [261 Pearl Street], William B. Gilley, A. T. Goodrich, J.V. Seaman, F. and R. Lockwood, 1821.
Owenson, Sydney. The Life and Times of Salvator Rosa. By Lady Morgan. In Two Volumes. London: Henry Colburn [New Burlington Street], 1824.
Owenson, Sydney. Absenteeism. London: Henry Colburn [New Burlington Street], 1825.
Owenson, Sydney. The Book of the Boudoir. By Lady Morgan. In two volumes. London: Henry Colburn [New Burlington Street], 1829.
Owenson, Sydney. O'Donnel. A National Tale. By Lady Morgan. Revised edition, Complete in One Volume. London: Henry Colburn and Richard Bentley, John Cumming, John Bell and John Bradfute [12 Bank Street], 1835.
Owenson, Sydney. The Princess; or, The Beguine. By Lady Morgan. Author of "O'Donnel," Etc. Frankfort: Fred Wilmans Magazine of Arts and Literature, Ad. Wahlen, 1835.