The league features six franchises, which are located through Central-eastern Ontario in Amherstview, Campbellford, Gananoque, Napanee, Port Hope, and Picton. The Port Hope Panthers is the new name of the transferred Colborne Cobras franchise.
The teams play a 40-game regular season, with four home and away dates against each of the other Empire B teams. The top four teams make the playoffs — two rounds of best-of-seven play. The Empire playoff champions advance to the OHA quarterfinals against the Central champions and compete for an All-Ontario Championship and the Clarence Schmalz Cup. In its 20-year history, two Empire B teams have won the Schmalz Cup. Napanee Raiders were the first in 1993. On May 1, 2013, the Picton Pirates became the second team in Empire league history to win the Clarence Schmalz Cup as OHA Junior C champions, defeating the Essex 73's of the Great Lakes Junior C Hockey League 4-games-to-1.
The Empire league has had a number of winners of the OHA Junior C Player of the Year award. Most recently, Napanee's Pete Sergeant took the honours in 2008-2009. Among the previous winners are Jason Sutton (Napanee), Adam Walsh (Picton), Joe Curry (Campbellford), and Ryan Zufelt (Amherstview).
At the conclusion of the 2014-15 hockey season the Eastern Ontario Junior B Hockey League announced a re-organization which saw them remove six teams from the league. One of those teams, the Gananoque Islanders immediately petitioned and was accepted into the Empire B Junior C League.
Following the 2015-16 seasons the Empire B Junior C Hockey League amalgamated with the other southern Ontario junior "C" hockey leagues and became a division within the Provincial Junior Hockey League.
(*) At times in the 1960s, the Junior B and C leagues in Eastern Ontario played as a single league. In those years, listed is the best Junior C team in the joint standings.
The league has had a few graduates make it to the NHL. In 2006, Carolina's Justin Williams became the league's first graduate to hoist the Stanley Cup. He played with the former Colborne/Brighton franchise. Former Amherstview Jets defencemen Jay McKee (Pittsburgh Penguins), Bryan Allen (Florida Panthers), and Kip Brennan (New York Islanders) have also skated in the pro league.