The northern colletes is a species of bee within the genus Colletes. Northern colletes are solitary bees, though females may nest in what are termed aggregations – sites where the bees nest close together, but do not form colonies as social bees do. They nest underground in soft soil, digging burrows up to 20 times their body length. It is often to be found nesting in coastal sand dunes and, on Hebridean islands, machair.

The genus Colletes is a large group of ground-nesting bees of the family Colletidae. They occur primarily in the Northern Hemisphere. They tend to be solitary, but sometimes nest close together in aggregations. Species in the genus build cells in underground nests that are lined with a cellophane-like plastic secretion, a true polyester, earning them the nickname polyester bees.