Martin Luther King Jr is a 95-year-old . We trawled the web to determine that Martin Luther King Jr's height is 5ft 6 ½ (168.9 cm), but due to his age may this may cause shrinking over the coming years. Currently this makes him 2.6 inches shorter than the average male in the United States. Are you looking for more information about Martin Luther King Jr and his career? We found resources at curlie.org, archive.org, fbi.gov & nobelprize.org.