James Macarthur (15 December 1798 – 21 April 1867) was an Australian pastoralist and politician.
He was a member of the New South Wales Legislative Council on three occasions between 1839 and 1843, 1848 and 1856 and finally from 1866 until his death.
He was also a member of the New South Wales Legislative Assembly between 1856 and 1859.