Tone King is a manufacturer of vacuum tube guitar amplifiers and stand-alone attenuators located in Baltimore, Maryland, U.S.

Tone King was founded by Mark Bartel in 1993 in Kingston, New York, after studying vintage fender amplifiers with blues guitarist Ben Prevo.

Tone King is one of the boutique "vintage" amplifier companies making Fender style amps.

Tone King was owned by the company Premier Builders Guild (PBG).

Of the Tone King Ironman II Mini attenuator, Guitar Player magazine reviewer Dave Hunter said this in a June 28, 2016 review: "The Ironman II Mini will go down to whisper-quiet, and sound reasonably good in the process, but the better test was in knocking off a reasonable 6dB to 9dB, at which levels I found it impressively accurate and unobtrusive.