Glycated hemoglobin (hemoglobin A1c or Hb_A1c) is a surrogate marker for blood glucose levels.

A1C may also refer to:

• A1C, a Rivian prototype vehicle
• A1C spacesuit, an Apollo variant of the NASA Gemini spacesuit
• Airman first class, an enlisted rank in the U.S. Air Force
• A1C, a postal code in Downtown St. John's, Newfoundland Island, Canada

• All pages with titles beginning with A1C
• All pages with titles containing A1C
• AIC (disambiguation)
• ALC (disambiguation)
• Alpha-1A adrenergic receptor, formerly known also as the alpha-1C adrenergic receptor
• MV A1C William H. Pitsenbarger, a container ship