The yellowhammer is Emberiza citrinella, a species of Old World passerine bird.
Yellowhammer may also refer to: A regional name for the yellow shafted subspecies (Colaptes auratus auratus) of the northern flicker, a North American woodpecker Yellowhammer, a nickname for someone from Alabama Yellowhammer News, a conservative news website in Alabama Yellow hammer, 12–6 curveball in baseball Operation Yellowhammer, contingency plan for a "no-deal" Brexit Yellowhammer cookie, the state cookie of Alabama