The Pig or sometimes translated as the Boar is the twelfth of the 12-year cycle of animals which appear in Chinese zodiac, in relation to the Chinese calendar and system of horology, and paralleling the system of ten Heavenly Stems and twelve Earthly Branches. Although the term "zodiac" is used in the phrase "Chinese zodiac", there is a major difference between the Chinese usage and Western astrology: the zodiacal animals do not relate to the zodiac as the area of the sky that extends approximately 8° north or south of the ecliptic, the apparent path of the Sun, the Moon, and visible planets across the celestial sphere's constellations, over the course of the year.

The Chinese zodiac is a traditional classification scheme based on the Chinese calendar that assigns an animal and its reputed attributes to each year in a repeating twelve-year cycle. In traditional Chinese culture, the Chinese zodiac is very important and exists as a reflection of Chinese philosophy and culture. Chinese folkways held that one's personality is related to the attributes of their zodiac animal. Originating from China, the zodiac and its variations remain popular in many East Asian and Southeast Asian countries, such as Japan, South Korea, Vietnam, Singapore, Nepal, Bhutan, Cambodia, and Thailand.