1945 South American Championship squads

These are the squads for the countries that played in the 1945 South American Championship. The participating countries were Argentina, Bolivia, Brazil, Chile, Colombia (for the first time), Ecuador, and Uruguay. Paraguay and Peru withdrew from the tournament. The teams plays in a single round-robin tournament, earning two points for a win, one point for a draw, and zero points for a loss. Colombia was represented by the club Junior.