 Gouldsboro was named for Jay Gould, who built a tannery in the area before becoming famous as a financier.According to the United States Census Bureau, Gouldsboro has a total area of 3.004 sq mi (7.783 km2), of which 2.596 sq mi (6.723 km2) is land and 0.408 sq mi (1.06 km2), or 5.72%, is water.As of the Census of 2010, there were 890 people, 353 households, and 253 families in Gouldsboro.