If you're talking about the games, you can find Charmander in different locations depending on the specific Pokemon game:
* Pokemon Red/Blue/Yellow: You can get a Charmander from Professor Oak at the beginning of the game.
* Pokemon Gold/Silver/Crystal: You can find Charmander in the Ilex Forest.
* Pokemon Ruby/Sapphire/Emerald: You can find Charmander in the Petalburg Woods.
* Pokemon Diamond/Pearl/Platinum: You can find Charmander in the Route 202.
* Pokemon Black/White/Black 2/White 2: You can find Charmander in the Floccesy Ranch.
* Pokemon X/Y/Omega Ruby/Alpha Sapphire: You can find Charmander in the Santalune Forest.
* Pokemon Sun/Moon/Ultra Sun/Ultra Moon: You can find Charmander in the Hau'oli City.
* Pokemon Sword/Shield/Scarlet/Violet: You can find Charmander in the Asado Desert.
If you're looking to catch a Charmander in the real world, you can check out Pokemon GO. Charmander is a common Pokemon in the game, and you can find it in many places, especially in urban areas.