That's a great question, and the answer is a definite yes! Adding a locking mechanism to a standard outdoor trash can is not only possible, but it's also a very common and practical solution for many homeowners. The main reasons people do this are to keep out wildlife like raccoons, stray cats, and dogs, and to prevent the lid from blowing open in the wind, which creates a mess.
You have a few straightforward options. The simplest and most affordable method is a DIY bungee cord or strap. Just hook it from the handle on one side of the can, over the lid, and to the handle on the other side. It's effective against wind and casual nudging. For more determined pests, you can install a latch. Common choices are a simple hasp and staple lock (like you'd see on a shed door) or a sliding barrel bolt. These require basic tools to screw into the plastic of the can and lid. You can then use a padlock for complete security.
If you prefer a ready-made solution, many companies sell universal locking kits or straps designed specifically for trash cans. These often require no drilling and are adjustable. Another popular route is to simply replace your current can with a model that has a built-in locking lid, which offers the cleanest look and integrated design.
Before you start, check your local waste collection rules. Some services require quick, unhindered access for automated trucks. A simple, removable strap or a lock you remember to open on pickup day is usually the best bet. Adding a lock is a small project that makes a big difference in keeping your outdoor area tidy and pest-free.