MP35N is a cobalt-nickel-based superalloy that consists of ~35% nickel, ~35% cobalt, ~20% chromium, ~10% molybdenum, and trace amounts of other alloying agents. Cobalt-nickel-based alloys, such as MP35N are commonly used for cardiovascular stents due to their exceptional corrosion resistance, high strength, and high toughness. Understanding the mechanical properties of MP35N is therefore important to accurately determine the cyclic stress states and predict fatigue performance. Although cold worked MP35N will respond to aging through an increase in both yield strength and ultimate strength, stents fabricated from MP35N tubing typically use the material in its annealed state to retain the high elongation to failure, since the stent must be crimped on to a catheter. The crimping process can induce strains in the stent crowns on the order of 6-10%, which would likely induce damage in cold-worked and age-hardened MP35N. The residual stresses developed during this crimping and expansion process play an important role in predicting the cyclic stress state in the stent once it is operating under the cyclic loads induced by the cardiac rhythm. The small, intricate design of stents makes experimental measurements of the stress/strain state in stents very difficult. Finite element analysis (FEA) is therefore frequently used to calculate the stresses in medical devices such as stents. If both the elastic and plastic regions of the stress-strain curve of MP35N are determined experimentally, then FEA can be used to model crimping the stent onto the catheter, expansion of the stent into the vessel, stent recoil after deployment, and the cyclic cardiac loading. Modeling of the crimping and expansion steps allows for an estimate of the residual stresses to be incorporated into the model during subsequent cyclic loading. The purpose of this study was to experimentally measure the residual stress distribution in MP35N wire due to bending and compare the measured residual stresses to the stress distribution predicted by FEA. Both fully annealed and cold worked/aged wires were analyzed.