An illness during the winter of 1913–14 took its toll on Kilner at the start of the 1914 season. He passed 1,000 runs for the second time but due to his uncertain form, his aggregate of runs and his average both fell. He scored 1,329 runs (average 30.90), placing him fourth in the Yorkshire batting averages. His bowling was rarely used and he took just one wicket. Kilner scored his second first-class century against Gloucestershire late in the season; he made 169 in nearly three and a half hours, hitting 28 fours. Yorkshire fell to fourth in the championship.