- For the late 17th century pirate and slave-trader, see Thomas Mostyn.
Lloyd-Mostyn was the eldest son and heir apparent of Edward Lloyd-Mostyn, 2nd Baron Mostyn. He was educated at Christ Church, Oxford. He was elected unopposed at a by-election in 1854 to succeed his father as Member of Parliament for Flintshire in 1854, a seat he held until his death in May 1861, aged only 31. His son Llewellyn succeeded in the barony in 1884.
- Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990.
- Leigh Rayment's Historical List of MPs
- Hansard 1803–2005: contributions in Parliament by Thomas Lloyd-Mostyn
|Parliament of the United Kingdom|
| Member of Parliament for Flintshire
Lord Richard Grosvenor
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