TRPA can refer to:

• Tahoe Regional Planning Agency
• TRPA, a family of transient receptor potential ion channels

• Astrocytes
• Astrocytoma
• Astrocytomas
• Astro dome
• Astrodome
• Astrodon johnstoni
• Astro-E
• Astro-E2
• ASTRO-E2
• ASTRO-EII
• Astrofix
• Astrogation
• Astro-geodetic
• Astroglide
• Astrogliosis
• Astrograph
• Astrographic camera
• AstroGrid
• Astrogyne
• Astroid
• Astroids
• Astro Invader
• Astrojax
• Astrolabe
• Astrolite