| Acronym | Definition |
|---|
| SSA | Social Security Administration |
| SSA | Software Support Activity |
| SSA | Selective Service Administration |
| SSA | Source Selection Authority/Advisory |
| SSA | Social Security Act |
| SSA | Sub-Saharan Africa |
| SSA | Secretaría de Salud (México) |
| SSA | Static Single Assignment |
| SSA | Serial Storage Architecture (ANSI X3710.1) |
| SSA | Sarva Shiksha Abhiyan (India) |
| SSA | Soaring Society of America |
| SSA | Shan State Army (Burma) |
| SSA | Seismological Society of America |
| SSA | Social Security Agency (UK) |
| SSA | Same-Sex Attraction |
| SSA | Supervisory Special Agent |
| SSA | Standard Spending Assessment (UK) |
| SSA | Special Service Area (property tax to fund redevelopment of rundown buisness districts) |
| SSA | Self Storage Association |
| SSA | Space Situational Awareness |
| SSA | Supply Support Activity (AR 310-50) |
| SSA | SPARC Storage Array |
| SSA | Semiconductor Safety Association |
| SSA | Society of Southwest Archivists |
| SSA | Sole-Source Aquifer |
| SSA | Singapore Soka Association |
| SSA | Secretaría de Salubridad y Asistencia (Mexican Health Secretariat) |
| SSA | Statistics South Africa |
| SSA | Southern Shrimp Alliance |
| SSA | Search Software America |
| SSA | System Safety Assessment |
| SSA | Special Security Agreement |
| SSA | Single Shared Assessment |
| SSA | Society of Scottish Artists |
| SSA | Senior Special Agent |
| SSA | Southeastern Software Association |
| SSA | S-Band Single Access (Hubble Telescope data processor) |
| SSA | Side Side Angle (geometry) |
| SSA | Solar System Ambassador (NASA Jet Propulsion Laboratory) |
| SSA | Sat Sri Akal |
| SSA | Service Specialists Association |
| SSA | Sector-Specific Agency (US Department of Homeland Security) |
| SSA | Steady State Approximation (reaction kinetics/physical chemistry) |
| SSA | Space Suit Assembly |
| SSA | Service Station Association Ltd (Australia) |
| SSA | System Safety Analysis (avionics) |
| SSA | Singapore Student Association |
| SSA | Signal Security Agency |
| SSA | Side Saddle Association (riding) |
| SSA | Singular Spectral Analysis |
| SSA | Small Slope Approximation |
| SSA | Solid State Amplifier |
| SSA | School Superintendents of Alabama |
| SSA | System Security Administrator |
| SSA | Saitama Super Arena (Saitama, Japan) |
| SSA | Singapore Swimming Association |
| SSA | Southwestern Sociological Association |
| SSA | Sun Sensor Assembly |
| SSA | Sewage Sludge Ash (admixture to concrete or mortar) |
| SSA | Specialty Sleep Association |
| SSA | Singapore Scout Association |
| SSA | Salvador, Bahia, Brazil - Dois De Julho (Airport Code) |
| SSA | Sisters of St. Ann (religious order) |
| SSA | Secular Students Alliance |
| SSA | System Security Assessment |
| SSA | State Space Analysis |
| SSA | Shipbuilders and Ship-repairers Association |
| SSA | System Support Activity |
| SSA | Spojene Staty Americke (Czech: United States of America) |
| SSA | Self-Structuring Antenna |
| SSA | Seacoast Shipyard Association |
| SSA | Soprano Soprano Alto (sheet music parts) |
| SSA | Standard Service Agreement |
| SSA | Sporting Shooters Association (Australia) |
| SSA | Simian Society of America |
| SSA | Supply Systems Analyst |
| SSA | Singapore Shooting Association |
| SSA | System Security Analysis |
| SSA | Student Science Association |
| SSA | Similarity Structure Analysis |
| SSA | Software Support Agency |
| SSA | Single Sailors Association |
| SSA | Southern Surgical Association |
| SSA | Supply Support Arrangements |
| SSA | Senior Security Advisor |
| SSA | Spartan School of Aeronautics |
| SSA | Simple Stereo Architecture |
| SSA | Sonoran Sea Aquarium (Tucson, Arizona) |
| SSA | Supply Support Agreement |
| SSA | Atlantic Silverside (FAO fish species code) |
| SSA | special support activity (NSA) |
| SSA | Security Supporting Assistance |
| SSA | Stock Subscription Agreement |
| SSA | Supervisory Staff Administrator |
| SSA | Southsea Shakespeare Actors |
| SSA | Small Station Association (Public Television) |
| SSA | supply support area (US DoD) |
| SSA | Supporting Supply Activity |
| SSA | Subscriber's Savings Account (United Services Automobile Association) |
| SSA | Society Security Administration |
| SSA | SATCOM Signal Analyzer |
| SSA | Software Sneak Analysis |
| SSA | strapdown sensor assembly (US DoD) |
| SSA | Sector Safe Altitude (aviation) |
| SSA | System Support Administrator |
| SSA | Space Shuttle America (amusement park ride) |
| SSA | Student Services Association |
| SSA | Station Select Address |
| SSA | Sub-System Allowed |
| SSA | Soulshot A Grade (Lineage 2 game) |
| SSA | Small-Scale Area |
| SSA | Special Somatic Afferents |
| SSA | Software Specification Assistant |
| SSA | System Specific Alias (IBM mainframes) |
| SSA | Singapore Scout Movement |
| SSA | System Support Analysis |
| SSA | Security Support Activity |
| SSA | Subject Says All |
| SSA | Synaptophysin-Stained Area |
| SSA | Soviet Secret Agent |
| SSA | Staff Support Activity |
| SSA | Supportive Service Assistant (education) |
| SSA | Super Systems Administrator (higher privilege level than Systems Administrator) |
| SSA | Soldier Survivability Assessment |
| SSA | Synchro Signal Amplifier |
| SSA | Serial Source Acquisition |
| SSA | Society of Student Archivists |
| SSA | Subspace Anomaly (Star Trek) |
| SSA | Staff Supply Assistant |
| SsA | Long Side, Short Side, Angle Condition (geometry) |
| SSA | Standard System Applications |
| SSA | Single Stock Account |
| SSA | Slot Spiral Antenna |
| SSA | Southwell School Association (Hamilton, NZ) |
| SSA | Square Spiral Antenna |
| SSA | Stochastic Scattering Approach |
| SSA | Step Scan Analyzer |
| SSA | System Supportability Assessment |
| SSA | System Specification for ATCCS |
| SSA | Series-System Availability |
| SSA | Special Supply Activity |
| SSA | Shared Signaling Access |
| SSA | Shanghai Sanitation Administration |
| SSA | Space Station Associates |
| SSA | Supplemental Service Agreement |
| SSA | Simultaneous Sparse Approximation |
| SSA | Street Sweeper Arias (video game character) |