Super strength

Super Strength was the ability to exert physical force greater than what their body would allow. It was a common power among many supernatural beings (particularly demons), though their exact level of strength could vary between beings and races.

Vampires

 * Vampires: All vampires were stronger than humans (newly-risen vampires can lift and throw humans with ease). Strength increased with age. (vampires aged 500+ years can decapitate opponents with ease).
 * Turok-Han: Greater than normal vampires.
 * Van-Tal: Greater than normal vampires.
 * Zompires: Same as normal vampires.
 * Slaypires: Greater than normal vampires and Slayers.
 * New Vampires: Greater than normal vampires (Can toss aside vehicles)

Standard Demons

 * Vengeance Demons: Greater than humans. (Could lift humans and send enemies flying).
 * Mok'tagar Demons (in demon form)
 * M'Fashnik Demons: Can lift and throw humans.
 * Brachen Demons
 * Fyarl Demons: Can break solid wood with ease.
 * Vyasa: Can be decapitate humans with ease.
 * Lorophage Demons
 * Vocah
 * Brotherhood of Seven: Can break from a wooden coffin.
 * Mofo Demons
 * Skip's species: Stronger than vampires.
 * Oden-Tal
 * Lizard Demons
 * Nezzla Demons: Can throw humans around.
 * Grappler Demons
 * Burrower Demon: Human hosts possessed great strength.
 * Tothric Clan
 * Wainakay Demon
 * Oden-Tal Demon: Can snap humans' necks with ease.
 * Vahrall Demon
 * Kith'harn Demon
 * Eyghon the Sleepwalker: Possessed humans had great strength.
 * Nitobe: On par with vampires aged 100+ years.
 * Puppet Demons: Great strength relative to their small size (Can overpower humans)
 * Granok Demon: Can move 2 tons with ease.
 * Razor's species: Can decapitate vampires with ease.
 * Telepathic Demons
 * Spike's crew: Can smash through concrete walls.

Other Supernatural Beings

 * Mummies: Can overpower humans.
 * Trolls: Greater than vampires aged 100+ years.
 * Bio-mechanical demonoid: Greater than Slayers (Can rip off vampire's heads with ease)
 * Werewolves (in wolf-form)
 * The Beast: Greater than Slayers.
 * Zombies: Can overpower two men at once.

Super Humans

 * Slayers: Greater than vampires aged 200+ years and some demons. (Can carry several hundred pounds with ease/can lift roughly 2 tonnes with effort).
 * Connor: Greater than Vampires
 * Caleb: Greater than Slayers
 * Marcus Hamilton: Greater than Vampires and Slayers. Can punch a hole through a man's chest.
 * Primals: When possessed, could be as strong as Slayers.
 * Severin

Robots

 * April: Can lift and throw humans.
 * Buffybot: Can shatter bricks by punching them.

Higher Beings and Old Ones

 * Glorificus: Greater than Slayers and Demons in her human form. (Can demolish an entire building by stomping her foot and slaughter hundreds of men in mere seconds.)
 * Illyria: Greater than Slayers and Demons. (Can lift an Indian elephant in a child's body and battle T-Rex) Still possessed great strength when her powers were diminished (Can shatter a demon's head with a single punch).
 * Maloker: More powerful than all other vampires.
 * Jasmine: Greater than Vampires and Demons. (Can lift a station wagon)
 * Myresto Mor: Greater than vampires aged 200+ (Can rip limbs off a vampire)

Ways to Enhance Strength

 * Casting To Enhance Strength spell on oneself will grant Slayer-level strength.
 * Equipping the Orbs of Nezzla'khan will grant the user enough strength to lift an entire armoured car.
 * Vampires can enhance their strength by drinking special blood.
 * The drugs the Initiative agents took that were administered by Maggie Walsh enhanced their physical attributes, but not to a supernatural level.
 * Pete Clarner used a special formula to enhance his strength.
 * Demonic Possession could cause the victim to have fits of inhuman strength.