James Mansfield, Sr. (9 April 1939 – 29 January 2014) was an Irish property developer and millionaire with a property portfolio that included the Citywest Hotel and Golf Resort, several developments local to the Saggart, Citywest and Tallaght areas, and Weston Airport. Mansfield had been involved in high-profile disputes over planning permission for his developments. By 2011, Mansfield's companies' debts could not be serviced, and his commercial properties passed to the National Asset Management Agency.