SLA may mean:

• South Los Angeles
• Stererolithographic apparatus, a rapid prototyping machine
• Martín Miguel de Güemes Airport (via IATA airport code), in Salta, Argentine
• Symbionese Liberation Army, kidnappers of Patty Hearst
• South Lebanon Army, an Israeli-backed militia during the Lebanese Civil War
• State Line Avenue, in Texarkana, United States
• Sudan Liberation Army, a rebel group in the Sudanese region Darfur
• SLA Industries, a role-playing game written by Nightfall Games
• Service Level Agreement, in IT parlance
• Second language acquisition
• Sign Language Associates, Washington DC area Sign Language interpreters
• Special Libraries Association, an association for professional librarians working in specialized libraries
• Short Long Arms Suspension, a wheel suspension type for vehicles with wishbones of unequal length
• Sealed lead-acid, a type of lead-acid battery
• Slow left arm, a bowling style in cricket

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