Semiconductor packages and methods of forming the same are disclosed. One of the semiconductor packages includes a circuit board structure, a first redistribution layer structure, a plurality of first bonding elements, a package structure and a plurality of second bonding elements. The first redistribution layer structure is disposed over and electrically connected to the circuit board structure. The first bonding elements are disposed between and electrically connected to the first redistribution layer structure and the circuit board structure. The package structure is disposed over and electrically connected to the first redistribution layer structure. The second bonding elements are disposed between and electrically connected to the first redistribution layer structure and the package structure.