Competing countries in the Gold Cup had to name a huge 60-man roster by the end of last week, with that whittled down to 23 at the start of July.
Johnson made his Jamaica debut last October, playing in back-to-back friendlies against Saudi Arabia in Riyadh.
In the second of those games, he scored with a fine left-foot finish from outside the box.
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With 37 players to miss out from making the cut, there is a possibility that Johnson won't be involved.
But North End will have to plan for the possibility of being without the 28-year-old, with the group stages starting on July 10 and the final being on August 1 - a week before the season kicks-off.
Jamaica are in a group with Suriname and Costa Rica, and they will be joined by a qualifier from a preliminary section of the tournament.
Johnson, who signed a new contract in January, made 35 appearances for PNE last season, scoring five goals in all competitions.
He missed the final seven games of the season with a calf injury.
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