Edward Bloom
The main protagonist and hero of the stories told. He is the big fish referred to in the title.
William Bloom
Edward Bloom's son. The stories of his father's adventures are told by him, while he is at his deathbed. William is angry for his father's lack of sincerity and constant joking, but realizes that this is his main virtue.
Sandra Kay Templeton
Edward Bloom's wife and William's mother. Their meeting is told in one of the adventures where Edward had to fight Don Price for her love.
Don Price
Don Price is one of the ruffians who stole the old lady's eye. He is also Edward's opponent in the fight to win Sandra's heart.