The present study investigates the age, growth, length-weight relationship and sex ratio of the Cyprinus carpio (Linnaeus, 1758) collected in the Lake Karaboğaz. The ages of 250 carps caught between October 2008 and June 2010 ranged from I to IV. The female:male ratio was 1.37:1. The fork length of the females ranged from 150 mm to 570 mm, and of males from 145 mm to 442 mm. The weight of the females ranged from 61 g to 2354 g and of males from 56 g to 1227 g. The length-weight relationship showed an allometric growth (b=2.88; r=0.969). The data were compared with those obtained from other lakes in the Kızılırmak Delta.