Wacky Packages were released in Canada in 1974 under the O-Pee-Chee name.

O-Pee-Chee, also known as OPC, is regarded as the Canadian equivalent of Topps.  OPC was founded in London, Ontario in 1911 by two brothers, John and Duncan McDermid.  The name was taken from "Opechee", the robin's name in the Henry Wadsworth Longfellow poem "The Song of Hiawatha".

Like many gum companies, O-Pee-Chee got into trading cards in the 1930's, and put out a few baseball sets from 1933 to 1937.  After that brief period, OPC stayed out of the card market until 1965, when they made arrangements with Topps for a license to print and distribute Topps products in Canada.

Beginning with baseball cards, the O-Pee-Chee cards were simply a rebranded version of the Topps design and marked "Printed in Canada".  OPC also reprinted Topps' non-sports sets, such as tattoos and the 1966 Batman series.  In 1968, the license was extended to hockey, and O-Pee-Chee began producing it's own cards for Canadian football, something Topps had been doing earlier.

 In 1970, OPC cards became bilingual, and the wrappers, boxes, and card backs were printed with both English and French.  This was a legal requirement, as federal legislation demanded that items produced in Canada carry both languages.  This also applied to other products such as cereal boxes, etc.

OPC issued their first wackys in 1974, reprinting most of the original 1st, 2nd, 3rd, and 4th series.  They also later printed the 1982 album stickers,  and then the U.S. 2nd, 3rd, and 4th reissue sets of 1980 were released in Canada in 1987, 1988, and 1989. 

The last wacky OPC set was in 1992, as a reprint of the 1991 U.S. set.  Then the 1994 baseball strike, the 1994-95 hockey lockout, and the accompanying damage to the baseball card industry hit O-Pee-Chee particularly hard.  The company first announced that it would get out of the card business and refocus its efforts on candy.  But in 1996, OPC was bought out by Nestlé.