Nearly the entire universe of ETFs are commission-free.*
Download a list of commission-free ETFs.
The only types of ETFs that aren't commission-free are leveraged and inverse ETFs, which account for only about 10% of all ETFs available. You might recognize them when you see "2x," "ultra," "daily," or something similar in the name of the ETF.
We exclude them for a good reason. Leveraged and inverse ETFs are intentionally designed to be bought and sold within a very short time period (for example, 1 day or 1 month), making them extremely speculative in nature. They're meant to be short-term trading tools and aren't intended for buy-and-hold investing. We—and the vast majority of the Vanguard community—prefer to think long-term. It's as simple as that!
On January 22, 2019, Vanguard stopped accepting purchases in leveraged and inverse ETFs, as well as leveraged and inverse mutual funds or ETNs (exchange-traded notes). If you already own these investments, you can continue to hold them or choose to sell them. If you choose to sell them, you'll have to pay a commission. You can also transfer them in kind from or to other institutions.