Ranged

Range is the potential maximum distance a projectile can be hurled by a ranged unit. It is measured in units of about Zergling's size. The only unit featuring minimum range is the Siege Tank in Siege Mode, which has a minimum range of 2.

Long Range

 * Siege Tank Siege Mode: 13; Thor air: 10; Viking Fighter Mode: 9; Missile Turret with Hi-Sec Auto Tracking: 8
 * Tempest: 15; Interceptor: 14; Colossus with Extended Thermal Lances: 9; Carrier: 8
 * Brood Lord: 9.5

Medium Range

 * Siege Tank Tank Mode, Thor ground, Auto-Turret or Planetary Fortress with Hi-Sec Auto Tracking, Missile Turret no upgrade: 7; Marauder, Ghost, Viking Assault Mode, Banshee, Battlecruiser, Planetary Fortress or Auto-Turret no upgrade: 6; Reaper buildings, Marine, Hellion: 5; Widow Mine: 5
 * Photon Cannon, Mothership: 7; Stalker, Immortal, Colossus no upgrade, Void Ray, Phoenix with Anion Pulse-Crystals: 6; Sentry: 5; Mothership Core: 5
 * Queen air, Spine Crawler, Spore Crawler: 7; Hydralisk with Grooved Spines, Corruptor: 6; Hydralisk no upgrade, Queen ground, Infested Terran: 5

Short Range

 * Reaper ground: 4.5; Hellbat 2
 * Phoenix no upgrade: 4; Oracle: 4; Archon: 3
 * Roach: 4; Mutalisk: 3; Locust: 3

Melee Range

 * SCV: 0.1
 * Probe, Zealot, Dark Templar: 0.1
 * Ultralisk: 1; Baneling: 0.25; Drone, Zergling, Broodling: 0.1

Unlimited Range
These spells can be cast anywhere on the map.
 * Scanner Sweep, Tactical Jump
 * Mass Recall

Vision Range
These abilities can be used anywhere a player has vision.
 * Calldown: MULE
 * Summon Nydus Worm

Long Range

 * Radar: 30; Nuke: 12; Yamato Cannon, EMP Round, Sniper Round: 10; Point Defense Laser with Hi-Sec Auto Tracking: 9; Point Defense Laser no upgrade: 8
 * Force Field, Feedback, Psionic Storm, Vortex: 9; Blink: 8
 * Disguise: 12; Spawn Creep Tumor from existing Creep Tumor: 10; Infested Terran (Spell): 9; Blinding Cloud: 9; Abduct: 9; Fungal Growth: 8

Medium Range

 * 250mm Strike Cannons: 7; Seeker Missile: 6
 * Neural Parasite, Transfusion: 7; Consume: 7; Corruption: 6

Short Range

 * Heal: 4; Build Point Defense Drone: 3; Build Auto-Turret: 2
 * Charge, Graviton Beam: 4
 * Contaminate: 3; Explode: 2.2; Spawn Larva, Spawn Creep Tumor from Queen: 1 Spawn Changeling: 0;