The 1963 International Cross Country Championships was held in San Sebastián, Spain, at the on 17 March 1963. The distance for the men's race was reduced from the traditional 9 miles (14.5 km) to 7.5 miles (12.1 km). A preview of the event was given in the Glasgow Herald. Complete results for men, junior men, medallists, and the results of British athletes were published.