The mechanical response of thoraco-abdominal solid organs subjected to compressive loads has been described in a limited number of studies and little is known about how this response fluctuates with age. The current study explores variations in the mechanical response of several porcine organs to small displacements over a wide range of ages. Seventeen female pigs ranging in age from 14 days to 211 days were used in this study. Based on necropsy analysis, this age range corresponds to a human abdominal development ranging from an infant to an adult. Each organ specimen was extracted and tested shortly after the animal was euthanized. A servomotor was used to apply 2 mm to 15 mm displacements with a 5.55 mm diameter spherical punch. A chamber was constructed to maintain an in vivo temperature environment while each organ specimen was subjected to a battery of displacements including non-injurious and injurious ramp-and-hold waveforms, as well as triangle waves over a frequency range of 0.25 Hz to 2.25 Hz. The force-penetration response of the liver, kidney, and lung is presented in this paper and evaluated for age dependence. Results from this study indicate a positive correlation between the tissue modulus and age for the porcine liver and kidney. The tissue modulus for the lung decreased with age. These results agree with past experimental findings in the literature. Future analyses will utilize quasi-linear viscoelastic theory and Boussinesq contact theory to generate constitutive models for each organ from the current study. The reduced relaxation functions and the instantaneous elastic models from these findings will be compared across ages to investigate fluctuations in the material response.