Marriott Robert Dalway (17 November 1832 – 10 January 1914) was an Irish politician. Although primarily known as an Irish Liberal Party member, various sources also designate him as conservative or liberal-conservative.
He was elected as the Member of Parliament (MP) for Carrickfergus at the 1868 general election and held the seat until the 1880 general election.
Dalway was also a High Sheriff of County Antrim in 1859.
He married Elizabeth Barnes, daughter of Andrew Armstrong Barnes and Margaret Livingston, in 1859 and together they had four children:
Elizabeth (1860–1946)
Marriott William (born 1861)
Robert (born 1862)
John (born 1865)
Andrew Armstrong (born 1872)
Livingston (1864-1866)
Amy (1866-1867)
He died 10 January 1914 in Lorne, Victoria.