Ascorbic acid content in Citrus reticulata, Citrus sinensis, and Citrus limonum were estimated. Citrus reticulata contained 30.60mg/100g, Citrus sinensis had 55.9 mg/100g, Citrus limonum ascorbic content was 57.5mg/100g.These values were higher than the literature values. The high ascorbic contents in the three samples showed that they are highly rich in vitamin C and they may be good for the prevention and treatment of scurvy.