United States v. Southwestern Cable Co., 392 U.S. 157 (1968), is a case in the development of American administrative law.

Where Congress grants an agency the power to maintain and regulate an area guided by the "public interest, convenience, or necessity," such a grant of power can include the regulation of areas not explicitly contemplated by the organic statute, as long as they are within the scope of the purpose of the original statute.

Note: The approach in this case takes a much more expansive approach than the earlier case of ICC v. Cincinnati, New Orleans and Texas Pacific Railway Co. which provided for more limited powers for administrative agencies.

Specifically, ICC held that regulative powers must be expressly granted by statute and not implied, while NBC v. US, 319 U.S. 190 (1943), held that the issuance of regulations, though not expressly granted, are an acceptable way for the agency to fulfill its statutory obligations to serve the "public interest, convenience, or necessity."

Southwestern Cable filed an action to review the order, arguing that the regulations were impermissible.