Connally v. General Construction Co., 269 U.S. 385 (1926), was a landmark United States Supreme Court case in which the Court expanded and established key constructs of the Fourteenth Amendment's due process doctrine along with establishing the vagueness doctrine.

The case was a dispute regarding Oklahoma state statutes, which, in essence vaguely required businesses to pay workers not less than the "current rate of per diem wages in the locality where the work is performed".

[1] The Supreme Court nullified all enforcement of provisions §§ 7255 and 7257, of the Compiled Oklahoma Statutes, 1921.

The statutes together defined each day that the employer violated the provisions, as an additional count of the offense.

[2] The Supreme Court determined that the sections provided for violation of the 5th amendment rights of the employers, by not specifically defining what was and was not punishable; this ruling is particularly famous for furthering the scope of the vagueness doctrine.