NASL or Nasl can refer to:
- Nessus (software), Nessus Attack Scripting Language
- One of two US and Canadian soccer leagues:
- North American Soccer League, a professional men's soccer league in the United States, Canada, and Puerto Rico which began play in 2011
- North American Soccer League (1968–1984), a professional soccer league with teams in the United States and Canada that operated from 1968 to 1984
- North American Star League, a professional e-sports league for the real-time strategy game StarCraft II
- Gamma-2 Sagittarii, a star also called Nasl, Alnasl or El Nasl
- National Association for the Support of Long Term Care, national trade association representing suppliers and ancillary service suppliers to long term and post acute care