From Bulbapedia, the community-driven Pokémon encyclopedia.
Base stats are an important defining characteristic of each Pokémon species. Below appears a list, sortable by column, of Pokémon and their base stats in Pokémon GO.
Generally, Pokémon GO's base stats are directly derived from the Generation VI base stat values. The base Stamina stat in Pokémon GO is equal to
2 * HP, where HP is the Generation VI base HP stat. Generally, GO's base Attack stat is derived from the Attack, Special Attack and Speed stats in Generation VI, while GO's base Defense stat is derived from Defense, Special Defense and Speed stats in Generation VI.
For the list prior to the adjustments made in November, 2016, see here.
List of Pokémon by base stats