A rail fasteners (10) for mounting a rail to a support foundation are provided. The rail fastener includes a bottom plate (30) for engaging the support foundation, and a top plate (20) with a rail-mounting member for engaging the rail. A first elastomeric body (40) between the top plate and the bottom plate supports the top plate on the bottom plate. The rail fastener further includes at least one pressing member (50) for pressing the top plate towards the bottom plate or pressing the bottom plate towards the top plate. The rail fastener has a relatively low overall spring rate while maintaining a reasonable deflection range. The rail fastener also has a relatively small overall size and a simple structure, while has triple effective spring rates.