A breakaway signpost connector enables a sign support member to be fastened to an anchor member. The connector includes at least one shear member and a coupler assembly. The shear member has a first end, a second end, and a necked down section between the first and second ends. The coupler assembly surrounds the shear member and includes a first opening and a second opening. The shear member first end extends through the first opening, and the shear member second end extends through the second opening.