Mark Johnston may refer to:

"Our concern is for Senator Johnson's health," Mark Johnston, his spokesman, said.

Xtra Heat ran the six and a half furlongs under Mark Johnston in 1:16 3/5 and returned $17.80 on a $2 bet to win.

Senator Jerstad sought reelection in 2010 but was defeated in the general election by Republican Mark Johnston.

She was eventually sent into training with Mark Johnston at Middleham, North Yorkshire.

He was sent into training with Mark Johnston but sustained a pelvic fracture and was unable to race as a two-year-old.

Mark Johnston (PhD) (born 1960) is an Australian historian, teacher and author.

He was trained throughout his career by Mark Johnston in North Yorkshire.

Later he moved to Middleham to become a stable jockey to Mark Johnston.

The current editor-in-chief is Mark Johnston.