A rail post bracket includes a base with longitudinal members extending up from the base creating a square or rectangular surround for insertion of a rail post support and a rail post. The rail post support is inserted first following which the rail posts can be inserted over the rail post support and removed from the bracket to avoid the need for securing the rail posts into place using grout or concrete. The bracket base is attachable to any solid surface using bolts placed through bolt holes located in the base. Attached to the bottom of the base are adjustable feet for leveling of the rail post bracket. An adjustable mechanism is attached to and partially inset in the front longitudinal member to assist in leveling the rail post. Together these features enable a rail to be leveled in every direction and can be adjusted over time if the mounting surface moves and settles, as well as enabling the easy removal and replacement of rail posts.