In this work, PP/DDGS composite materials were explored using 10 wt% DDGS fibers within a PP matrix. Samples were prepared in order to determine the optimal processing methodology based on material performance. Mechanical investigation included both tensile and flexural tests performed according to ASTM standards D638 and D790, respectively. Water absorption tests were performed using a test modeled after ASTM D570. In this test, specimens were soaked in boiling water for 1 hour and tested for water absorption, after which they were tested in flexure to observe the resulting mechanical performance. Dynamic mechanical thermal analysis (DMTA) was also performed to observe changes in the glass transition temperature of the samples and subsequent crystallinity.