Mark Landon Johnson (born September 12, 1975) is a former professional baseball player, a catcher who played with several major league teams, but primarily with the Chicago White Sox.

On November 17, 2001 Mark married spouse Jamie Suzanne Webster, In Warner Robins, Georgia.

On December 3, 2002, he was traded with Keith Foulke, Joe Valentine, and cash to the Oakland Athletics for Billy Koch and two players to be named later (who would end up being Neal Cotts and minor leaguer Daylan Holt).

After 2004, he was granted free-agency, but was re-signed by the Brewers, who then traded him to the Chicago Cubs for Travis Ezi.

In December 2007, he signed a minor league contract with the St Louis Cardinals and was invited to their 2008 spring training, but did not make the team.

One source describes him as this: "He has decent gap power, resulting in his share of doubles, as well as a good eye at the plate.

Although he has never quite lived up to the "gap power", he has shown a fairly good eye at the plate, with 123 walks and 195 strikeouts so far in his career.

That same source goes on to say this about him: "He has very little home run power and is a fairly light hitter on the whole -- even worse against southpaws."

In 2011, Johnson managed the Boise Hawks, the Cubs' affiliate in the Class A-Short Season Northwest League.

In 2013, Johnson was named manager of the Kane County Cougars, the Class A affiliate of the Chicago Cubs.