The correlation between body measurements and fillet yield of 2-year female and male individuals in GIFT strain and Egypt strain Nile tilapia was studied by statistics analysis. The average fillet yield in Nile tilapia was 38.68%and the fillet yield value of males was slightly higher than that of femalethe fillet yield value of GIFT strain was slightly higher than that of Egypt strain. The results showed there was a strong linear relationship between body measurements and fillet yield，standard length and body width. While there were negative correlations between head length and both fillet weight and fillet yield.The correlation coefficient of male was higher than that of femalewhich was 0.630 between body weight and fillet yield and 0.617 between body depth and fillet yield indicating a medium correlation. Correlation between fillet yield and ratio of two body measurements was higher than the individual variablesespecially in male fishes. The following ratios of two body measurements showed stronger correlations with fillet yield than the individual variables0.7650.7320.703 and body weight/standard length. It was concluded that it is possible to predicting fillet yield based on body measurements in Nile tilapia.