Parsons King Johnson (May 8, 1816 – November 23, 1907) was an American pioneer.
Born in Brandon, Vermont, he settled in St. Paul, Minnesota Territory in 1849.
He served in the Minnesota Territorial House of Representatives in 1849 and 1856.
His brother-in-law was Henry Jackson; his grandson was Frank B. Johnson.
Johnson died in St. Paul, Minnesota.