The name refers to Grimsby's unique ability to cultivate peaches, a fruit that cannot be farmed without proper conditions.

In the early 1920s Col. Roberts had built a large cold storage facility for fruit in the summer that had ample capacity to make ice in the winter.

Shortly after, the professional Saskatoon Sheiks (who were later sold to New York to become the Rangers) also held training camps in Grimsby, and the town became an overnight hockey hotspot.

For the 1924-25 season, sponsors got involved and began scouring Ontario for the best hockey players to play for the Peach Kings.

With Pud Reid as their captain, they took the league title that year playing against Brantford, Niagara Falls, Welland, Port Colborne, and Dunnville.

But with less than 2 minutes remaining, Grimsby rookie Barry Blanchard wound up behind his own net, carried the puck down the ice, and dropped it to Norman Warner who evened the score.

Then with 39 seconds remaining, William Hutchison put the puck past the Markham goalie to win the Provincial Championship.

The following year with many of the same players, as well as new ones such as Jay Anderson, Derek Nichols and Steve Foster playing a larger role, the Peach Kings repeated by winning again, this time over Wingham in the Finals.

The following year, 2004–05, the Peach Kings made a run for the finals again led by Hodges, Fuller, Toth, Nichols, Anderson, and Foster with newcomers like star goalie Steve Mason, Dan Ellis, Joel Bristo, Joel Agnew, and returnee Scott Clark, the Peach Kings played to the finals again looking to win for a third straight time.

At the 2008 IIHF World Junior Hockey Championships, former Peach King goaltender Steve Mason led the Canadian National Team to a fourth straight gold medal.