The United States is filled with exciting destinations for travelers wanting to explore the natural beauty of Yellowstone National Park, test their luck in Las Vegas, or immerse themselves in art, food, and culture in New York City. But like any great travel destination, the United States has unique laws that travelers should know before entering the country and its different states. Understanding US laws and customs ahead of time will help you avoid unpleasant surprises and make the most of your trip. The list below covers the key laws you must be aware of and a few other considerations—like the tipping culture in the US.
Travel Visas
Depending on where a traveler is from, they may need to apply for a visa or the Electronic System for Travel Authorization (ESTA). The US has an agreement with 40 countries to bypass the need for a travel visa, though it’s still encouraged that travelers from these countries register with the ESTA. Most Canadian visitors only need a passport to enter the US.
Alcohol, Tobacco, and Marijuana Use
The legal drinking age in the United States is 21, and this age restriction also applies to the purchasing of tobacco and recreational marijuana products. Public drinking in the United States is illegal except in licensed establishments such as bars and restaurants. Additionally, if you’re planning on camping, you’ll want to check with the campground and the park you’re staying in for their specific rules relating to alcohol consumption while visiting and staying there.
It’s also important to be aware of specific smoking and marijuana laws in the state(s) you’ll be visiting. Most states have restrictions on where you can smoke cigarettes, with public spaces often having designated smoking areas. Marijuana is a more complicated topic to navigate for travelers as only a handful of states will legally allow you to buy marijuana products. Marijuana use is often restricted to private property, and not all accommodations permit it.
As of 2025, recreational marijuana is legal in the following states: Alaska, Arizona, California, Colorado, Connecticut, Delaware, Illinois, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nevada, New Jersey, New Mexico, New York, Ohio, Oregon, Rhode Island, Vermont, Virginia, and Washington.
Gambling
Though the US is home to one of the most popular gambling destinations in the world, Las Vegas, gambling isn’t legal in every state. Three states—Hawaii, Utah, and Tennessee—currently prohibit all forms of gambling. Many online casinos in the country offer real money games, but only in Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, and West Virginia. Over 30 states have legalized online sports betting. Before gambling, check each state’s regulations, as laws differ widely.
Driving Permits
To drive as a tourist in the US, you’ll need to be at least 18 and have a valid driver’s license issued by your home country. Some states may also require that you hold an International Driving Permit (IDP), so you’ll want to check the Department of Motor Vehicles (DMV) for the state(s) you plan to visit. Additionally, investing in insurance for the vehicle you’ll use while visiting is a good idea.
Littering
Across the US, littering is generally frowned upon, and in some states, violators can face fines, community service, and even jail time. Properly disposing of any trash and recycling you generate while visiting is the best way to ensure you’re not penalized. Don’t throw trash out a car window or leave it behind while hiking or camping. Usually, the places you find accommodations will provide details on how to dispose of your garbage.
Firearms
The US has a strong gun culture, and in your travels, you may come across individuals openly carrying firearms. This isn’t legal in every state and is more common in rural areas, but it’s still something to be aware of—as it can be surprising if you’re from a country with more restrictive gun policies.
Other Considerations
In addition to US laws that may directly impact you when visiting the US, several social norms, such as tipping norms, can vary from other countries. There are also highly recommended practices, like getting traveler’s insurance, which aren’t required by law.
Tipping Norms
Unlike some countries, tipping in the US is not really optional—it’s deeply ingrained in service culture. It’s expected at restaurants, bars, and salons and for delivery services. You may also encounter tipping at hotels, usually for bellhops and cleaning staff. Tips are typically expected to be 15-20% of your bill, though this may vary depending on the situation—for instance, at the bar, you might tip $1 per drink rather than tipping based on the total bill.
Politics
Small talk is a staple of American social interactions, but discussing politics can quickly turn uncomfortable and is generally frowned upon. The topic is often considered taboo and is undoubtedly divisive among the population, making it a subject best left alone.
Clothing
While it’s not uncommon to come across clothing restrictions in some countries, this isn’t a concern in the US—unless you’re going to a fine dining establishment, club, or other prestigious venue with a dress code. You can generally dress as you like, although you’ll likely want to consider the weather when packing clothing—it can vary drastically from state to state and season to season.
Traveler’s Health Insurance
Healthcare costs in the US are famously high, and it is highly recommended that visitors protect themselves from this potential cost with traveler’s health insurance. It’s not a requirement for visitors, but it can offer peace of mind—it’s something you hope to never use, but if you need it, you’ll be incredibly grateful you have it.
