Can a minor own an LLC?

In most states, yes. There is no federal age limit on owning an LLC, and most state statutes do not set a minimum age for members.

The catch is contracts. Minors generally cannot be held to a contract, which means banks, suppliers, landlords, and clients will usually require a parent or guardian to sign. Some states also require the person filing the formation documents to be an adult. So in practice a minor can own the entity, but an adult has to stand behind it. A few states are stricter than others, so check yours before filing anything.

The more useful question is whether your kid needs one at all. For a kid mowing lawns, walking dogs, or washing driveways for a few hundred dollars, usually not. An LLC separates business assets from personal ones, and that matters when there is something worth protecting and something worth being liable for.

It starts to matter when there is real revenue, equipment worth money, or work that could damage property or hurt someone. A kid with a pressure washer pointed at somebody's siding is much closer to that line than a kid selling bracelets.

If your kid's work involves ladders, chemicals, vehicles, or power equipment on other people's property, talk to someone who knows your state, and ask about insurance in the same conversation. For that kind of work, insurance usually matters more than the entity does.

More on the whole picture: what your kid legally needs to start a business.

This is general information, not legal advice. Rules vary by state and change over time.