Walsh, Richard Hussey (1825–62), economist, born in King's Co. (Offaly) on 25 July 1825, was the fifth son in the family of eight sons and one daughter of John Hussey Walsh (1791–1863), a justice of the peace, of Kilduff, near Tyrrellspass, King's Co., and Cranagh and Mulhussey, Co. Roscommon, and his wife Maria, daughter of Michael Henley of La Mancha, Co. Dublin. The Walshes were a catholic gentry family. John Hussey Walsh's great-great-grandfather, Walter Walsh of Cranagh (d. 1729), forfeited most of his estates as a Jacobite; his mother, Margaret, was the daughter and heiress of John Hussey (1731–97) of Mulhussey, whose grandfather, Miler Hussey, had been a major in James II's (qv) Irish army.
Richard Hussey Walsh entered TCD (1842), won prizes in maths, graduating BA (1847), LLB (1851) and LLD (1857). He was called to the Irish bar (1850) but began an academic career as Barrington lecturer in political economy at TCD (1850). Having competed successfully for the Whateley professor of political economy (1851), he met a requirement of the post by publishing some of his lectures as Elementary treatise on metallic currency (1853), a work praised by J. S. Mill and Nassau Senior. He was elected (1850) to the Dublin Statistical Society (later the Statistical and Social Inquiry Society of Ireland), acted as its honorary secretary (1851–7) and contributed eight papers to its journal (1851–8) as well as several papers to the Economist and to the British Association for the Advancement of Science. As assistant secretary to the royal commission on endowed schools in Ireland (1856–7) he collected and collated statistical information.
Walsh then left Ireland to take up duties as superintendent of government schools in Mauritius (May 1857). He increased the number from 20 to 44 in 20 months. Another duty on the island-colony was as a member of a commission to inquire into the organisation of 22 civil service departments. His final duty was to conduct a census of the island (1861). Richard Hussey Walsh died, of an ‘effusion of the brain’ (Hancock), on 30 January 1862 at Port Louis. Three of his brothers died after falls from horses. John Hussey Walsh's property in Roscommon passed to his sixth son, Walter (1827–1904), the only son to marry.