HMSA may refer to

• Hawthorne Math and Science Academy, a school in Hawthorne, California, USA
• Hawaii Medical Service Association

• Lockheed 1249 Starliner
• Lockheed 126 Neptune
• Lockheed 12A
• Lockheed 12 Electra Junior
• Lockheed 14 Super Electra
• Lockheed 186
• Lockheed 188 Starfire
• Lockheed 18 Lodestar
• Lockheed 1 Vega
• Lockheed 2
• Lockheed 2000
• Lockheed 212
• Lockheed 222 Lightning
• Lockheed 226 Neptune
• Lockheed 22 Lightning
• Lockheed 26 Neptune
• Lockheed 286
• Lockheed 2 Vega
• Lockheed 322 Lightning
• Lockheed 326 Neptune
• Lockheed 33 Little Dipper
• Lockheed 34 Big Dipper
• Lockheed 37 Harpoon
• Lockheed 37 Ventura
• Lockheed 3 Air Express