REG Mason City

REG Mason City

About the REG Mason City Facility

  • Nameplate Capacity: 30 mmgy
  • Feedstock: High and low free fatty acid feedstocks
  • Loading Capabilities: Truck and rail
  • Rail Line: Dual-served — Iowa Traction junction with UP Canadian Pacific
  • Production Start Date: July 2007


4172 19th Street SW
Mason City, IA 50401

Hours of Operation:

  • Loading: Monday – Friday: 6 AM – 5 PM CDT
  • Office: Monday – Friday: 7 AM – 5 PM CDT
  • Loading Appointment Required: Yes
  • Contact:

REG Mason City is a commercial-scale, state-of-the-art biodiesel production facility in Mason City, Iowa. The multi-feedstock refinery manufactures approximately 30 million gallons of high-quality biodiesel each year. REG acquired the facility in 2013. 

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