The use of phosphogypsum (PG) as a construction material continues to gain considerable attention worldwide. In the United States(US), the specific use of PG as a road base material has received renewed interest on a federal level. Previous work investigated the use of road base, either PG alone or stabilized with cementitious materials. This study investigated the physical characteristics of compacted PG sources and novel blends with traditional base aggregates compared to industry and state requirements. Specimens were created by blending up to 50% PG from five gypstacks in Florida, US with limerock (LR) and recycled concrete aggregate (RCA). The LBR for PG-LR and PG-RCA blends surpassed bearing strength (LBR) requirements and ranged from 102 to 130% and 155–210% at 50:50 ratios, and increased by 2–60% with decreasing PG content from 50 to 30%. The data suggest success of PG-amended granular base reported here relies largely on the strength of the original aggregate.