Noise attenuation apparatus for pressure regulators are disclosed. An example apparatus includes a first noise attenuator disposed at a first position in a fluid passageway of a pressure regulator and a second noise attenuator disposed at a second position in the fluid passageway. The second position is spaced apart from the first position along the fluid passageway. The example apparatus also includes fasteners extending between the first noise attenuator and the second noise attenuator to position the first noise attenuator at the first position and the second noise attenuator at the second position. The fasteners are to couple to peripheral portions of the noise attenuators.