The highly charged Al-like ions are the potential candidates for the next-generation atomic optical clocks, and their atomic parameters are also useful in plasma and nuclear physics. In the present work, the hyperfine interaction constants and Landé gfactors of 3s ²3p ²P _{1/2, 3/2}states in the ground configuration for Al-like ions in a range between Si ⁺and Kr ²³⁺ions are calculated by using the multi-configuration Dirac-Hartree-Fock method. Owing to the fact that hyperfine interaction constant is sensitive to electron correlation effects, we systematically investigate its influence on the hyperfine interaction constants, particularly for the high-order correlation related to the 2p electrons. According to this investigation and by taking into account the Breit interaction and QED corrections, we achieve the computational accuracy at a level of 1% and 10 ^–5for the hyperfine interaction constants and Landé gfactors, respectively, except for the Si ⁺ion. Furthermore, the electronic parts of hyperfine interaction constants and gfactors are fitted with functions of atomic number. The deviations between these fitted formulas and the ab initiocalculations are less than 2% and 10 ^–5for the hyperfine interaction constants and the g factors, respectively. As a result, the hyperfine interaction constants and gfactors of all isotopes can be determined for Al-like ions with 14 ≤ Z≤ 54.