墙草属（学名：Parietaria）是荨麻科下的一个属，为一年生或多年生、披散草本植物。该属共有30种，分布于温带和热带地区。

Parietaria is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.

They are annual or perennial herbaceous plants growing to 20–80 cm tall, with green or pink stems. The leaves are alternate, simple, entire, often with a cluster of small leaves in their axils. Individual flowers are bisexual or unisexual, produced in clusters of three to many together in the leaf axils. Plants have either bisexual flowers or both staminate ("male") and carpellate ("female") flowers. The fruit is a small dry achene.