This paper presents results of an experimental program undertaken to investigate the behavior of short rectangular reinforced concrete columns that have been strengthened with carbon fiberreinforced polymer (CFRP) sheets under axial compression. The effects of cross-sectional aspect ratio and strengthening system of the confinement were investigated experimentally through the tests of 12 reinforced concrete (R.C) columns. The behavior of columns in the axial and transverse directions was analyzed. From the experimental results, it is found that the aspect ratio between depth and width (t/b) of the cross-section plays a significant role on the efficiency of the applied strengthening system .Whenever aspect ratio increases; gained nominal strength clearly decreases so that in aspect ratio more than 2.5, the strength enhancement of confined rectangular column is insignificant. For the same amount of used fiber, it is found that the case of full wrapping is more effective than that of partial wrapping. Despite of this, partial wrapping strengthening system still gives a significant efficiency for rectangular columns.