No, Pluto is no longer considered a planet. In 2006, the International Astronomical Union (IAU) reclassified Pluto as a "dwarf planet" due to its size and orbit. According to the IAU, a planet must orbit the Sun, have enough mass to be spherical, and clear its orbit of other debris. Pluto does not meet the third requirement as its orbit crosses that of Neptune. Therefore, it is no longer classified as a planet.

The smallest planet in our solar system is Mercury, with a diameter of approximately 4,879 kilometers (3,032 miles).