What constellation is the earth in?

Constellations change depending on who is watching.

Our sun would appear as an additional star in the Cassiopeia constellation from the Alpha Centauri system, which consists of three stars, including Proxima Centauri, also known as Alpha Centauri C.

Our sun would be visible from Barnard's star as a bright extra star in the Monoceros constellation.

Constellations are divisions of the celestial sphere used for observational purposes based on perceived patterns of stars as seen from Earth; Earth is not located within any particular constellation; rather, it orbits around the Sun, which is located in the Milky Way galaxy.

The Earth is currently in the constellation of Pisces.

The Earth is in the Milky Way galaxy, which contains many constellations. However, if you're referring to the apparent position of the Sun in the sky throughout the year, then the Earth is in the constellation of the Zodiac corresponding to the current date. For example, during April, the Sun appears to be in the constellation Aries.