This article examines the effects on wages and employment of the minimum wage in agriculture during the interwar period. It finds that the impact of regulation was to raise the wage for agricultural labourers by 13 per cent when it was (re)introduced in 1924, by 15 per cent in the late 1920s, and by more than 20 per cent in the 1930s. The effect on farm employment was to reduce it by about 54,000 (6.5 per cent) in 1929 up to a peak of 97,000 (13.3 per cent) in 1937. The minimum wage lifted out of poverty many families of farm labourers who remained employed, but it significantly lowered the incomes of farmers, particularly during the 1930s.