The Northern Spy, sometimes known as "Northern Spie" or "Northern Pie Apple" is a cultivar of domesticated apple native to the Northern East Coast of the United States and parts of Michigan and Ontario.

Skin color is a green ground, flushed with red stripes where not shaded, and it produces fairly late in the season (late October and beyond). The white flesh is juicy, crisp and mildly sweet with a rich, aromatic subacid flavor, noted for high vitamin C content. Its characteristic flavor is more tart than most popular varieties, and its flesh is harder/crunchier than most, with a thin skin.

Zones 3-7. High quality late fall apple. Firm, aromatic, color is dark purplish red over green background. Flesh is white. Compares to McIntosh as a dessert apple. Ripens late September.