瑪莉·貝洛克·朗茲(英語:Marie Adelaide Elizabeth Rayner Lowndes,1868年8月5日—1947年11月14日),是一位多產的英國小說家。她的第一部長篇小說,《H.R.H. The Prince of Wales: an account of his career》於1898年出版。
著書
H.R.H. The Prince of Wales: an account of his career. New York & London (1898 as Anon, rev. 1901 as His Most Gracious Majesty King Edward VII)
The philosophy of the Marquise" (1899)
T.R.H. The Prince and Princess of Wales (1902, as Anon.)
The Heart of Penelope (1904, New York 1915)
Barbara Rebell (1905, New York 1907)
The Pulse of Life: a story of a passing world (1908, New York 1909)
Studies in Wives (1909, New York 1910)
The Uttermost Farthing (1908, New York 1910)
According to Meredith (1909)
Studies in Wives. Short Stories (1909)
When No Man Pursueth: an everyday story (1910, New York 1911)
Jane Aglander (1911, New York 1911)
Mary Pechell (1912, New York 1912)
The Chink in the Armour (1912, New York 1912, London 1935 as The house of peril)
The End of Her Honeymoon (New York 1913, London 1914)