MFJ Enterprises was an American manufacturer specializing in a wide range of products for the amateur radio market.

As of 2014, the company was recognized as the largest producer of amateur radio products worldwide.

[4] The initials "MFJ" in the company name are those of the founder, Martin F. Jue (ham radio callsign K5FLU).

On April 26th, 2024, Martin F. Jue announced that as of May 17, 2024, the company will cease on-site production at their Starkville, Mississippi, facility.

Ameritron, Hy-Gain, Cushcraft, Mirage, and Vectronics brand products will be affected by the shutdown.