1958-59 Quebec Junior Playoffs

Champions

 * Laurentienne League: Trois Rivieres
 * Metropolitan Montreal Junior League: Quebec Baronets
 * Saguenay Junior League: Port Alfred Nationale

''Note: These three teams won the right to play in the provincial playoffs by finishing first in their respective leagues. After these games were finished, they played in their own league playoffs.''

Provincial final
Round robin

Quebec Baronets won the provincial championship.

Quebec Baronets advanced to the 1958-59 Eastern Canada Memorial Cup Playoffs.

After playing in the 1958-59 Eastern Canada Memorial Cup Playoffs, the Quebec Baronets played in the Metropolitan Montreal Junior League playoffs.