Westmarch was a football stadium located on Greenhill Road in Paisley, Scotland, and was the home ground of St. Mirren F.C. from 1883 to 1894. After four years at their former home, Thistle Park, the Saints moved just a few hundred yards away to the Westmarch site.
The first match played at Westmarch was on 25 August 1883, and resulted in a shock 2-1 victory over Queen's Park. Over its eleven seasons of football, Westmarch played host to 54 competitive matches, of which St Mirren won 28, lost 20 and drew 6, scoring 159 times and conceding 114. The final game at the ground was against neighbours Abercorn in the final of the Paisley Charity Cup, a match that ended in a 10-0 victory for St Mirren.
The club opted to seek a new home when the Westmarch landlord doubled their rent, and moved a short way to Love Street. At the time of departure, Westmarch had two pitches, a pavilion, and a grandstand.