<p>Determination of elastic properties and investigation of mode-I fracture behavior of carbon fiber (CF)/graphene nanoplatelet (GNP)/epoxy hybrid laminated nanocomposites (HLNCs) were presented. Periodic microstructure model was used to calculate the elastic properties of HLNCs at a constant volume fraction (<i>V</i>_<i>f</i>) of CF and with varying <i>V</i>_<i>f</i> of GNP for different layups. These elastic properties were used to calculate the mode-I fracture energy ( <i>G</i>_<i>I</i> ) of all the HLNCs with a crack using finite element method. The stress variation along the length of the HLNCs was also investigated. It was found that both Young’s and shear moduli of all the HLNCs increase with <i>V</i>_<i>f</i> of GNPs increasing. Young’s modulus of unidirectional (UD), cross-ply (CP), and quasi-isotropic (QI) HLNCs with 9% <i>V</i>_<i>f</i> of GNP was 164.56, 151.91, and 144.53 GPa, respectively, along the <i>x</i> -direction. Poisson’s ratio of all the HLNCs changes in a different pattern as the <i>V</i>_<i>f</i> of GNP changes. The values of <i>G</i>_<i>I</i> and critical load were highest for UD followed by CP and then QI HLNCs. The highest value of normal stress along <i>x</i> -direction was 119.27 MPa for UD HLNC. The maximum value of shear stresses on <i>xy</i> -plane was found almost the same for all the HLNCs and this value was approximately 17 MPa. The strength of the laminated composite increased with the increasing <i>V</i>_<i>f</i> of GNPs.</p>