Does Costa Rica Require A Yellow Fever Vaccine? 2026 Rules For Travelers

If you are flying to Costa Rica from the US, Canada or Europe, you do not need a yellow fever vaccine. The rules only bite when your trip touches a country with yellow fever risk, before Costa Rica or as a side trip in the middle. Costa Rica tightened those rules several times in 2026, so here is what applies now.

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The Short Answer

• Arriving from the US, Canada or Europe: No yellow fever vaccine needed.
• Arriving from a risk country: Travelers aged 9 months and over need proof of vaccination, given at least 10 days before arrival.
• Costa Ricans and residents leaving for a risk country: Proof of vaccination is required before departure, and the list of countries grew on October 1, 2026.

Who Needs The Vaccine To Enter Costa Rica?

Costa Rica requires a yellow fever certificate from travelers aged 9 months and older who arrive from a country with risk of yellow fever transmission. The risk countries are in South America and Africa. Costa Rica’s Ministry of Health keeps its own list, which has included Brazil, Colombia, Peru, Bolivia, Ecuador, Venezuela, Paraguay and a group of African countries.

The certificate must show the vaccine was given at least 10 days before you arrive. A single dose is valid for life.

If you arrive from a risk country without it, you can be refused entry and put back on a flight. That is why airlines check before boarding on routes from South America.

The US Centers for Disease Control and Prevention publishes a simplified version of Costa Rica’s list, with some regional exceptions and exemptions for arrivals from Argentina and Panama. Check both the CDC’s Costa Rica page and your airline before you fly, because the lists do not always match.

The Side Trip Trap

Most US travelers who get caught by this rule are not coming from a risk country. They are going to one in the middle of their trip.

Say you fly into San José, spend two weeks in Costa Rica, take a week in Colombia or Peru, then fly back to Costa Rica before heading home. Your return to Costa Rica is an arrival from a risk country, so you need the vaccine at least 10 days before that flight. In practice that means getting it before you leave home, or at least 10 days before your side trip.

The same applies if you start your trip in Brazil, Bolivia or Ecuador and then fly to Costa Rica.

The 2026 Exit Rule For Costa Ricans And Residents

Costa Rica also checks vaccination on the way out for its own citizens and legal residents, including expats with residency, who travel to risk countries and plan to return. The rule has expanded in stages:

If you live in Costa Rica, the vaccine has to be given at least 10 days before departure. The provider must register it in Costa Rica’s SINOVAC system. You can then download the official certificate through the Health Ministry’s Virtual Office, the EDUS app or the Pura Vida Móvil app. A valid paper certificate you already have still works.

Foreign tourists who leave Costa Rica for a risk country and plan to come back should carry proof too. Travelers have been stopped at the airport over this rule, and the entry requirement will apply on the way back anyway.

Exemptions

• Age: Babies under 9 months, and in Costa Rica’s exit rule, people over 60, can qualify for an exemption.
• Medical reasons: People who cannot be vaccinated for medical reasons may qualify with documentation from a doctor.
• Pregnancy and breastfeeding: A temporary exemption can be issued with a medical certificate.
• Airport transit: Passengers who change planes without passing through immigration are generally exempt.

An exemption accepted by Costa Rica may not be accepted by the country you are flying to, so check with your airline and destination as well.

Where To Get Vaccinated

In the US, yellow fever vaccine is given at registered travel clinics, so book well ahead of your trip. In Costa Rica it is available through private pharmacies and health providers. Costa Rica had vaccine shortages earlier in 2026, and supply improved in September, but call ahead to confirm doses before you go.

This guide covers entry rules, not medical advice. Talk to a travel health provider about whether the vaccine is right for you.

Plan The Whole Route, Not Just Costa Rica

Yellow fever rules are one reason multi-country trips need more planning than a simple round trip. Many of the countries on the risk list, including Colombia, Peru, Ecuador and Bolivia, also ask for proof of onward travel at check-in or at immigration. See our onward ticket requirements by country before you book.

FAQs

Do US citizens need a yellow fever vaccine for Costa Rica?

Not when flying from the US. You only need it if you arrive from, or have recently been in, a country with yellow fever risk.

Does a layover in Colombia or Panama count?

A connection where you stay in the international transit area and do not pass through immigration is generally exempt. If you leave the airport, it counts as a visit.

How far ahead do I need the shot?

At least 10 days before you arrive in Costa Rica from a risk country, or before you leave Costa Rica for one if the exit rule applies to you.

What happens if I arrive without proof?

You can be refused entry and returned on the next available flight, and airlines may refuse to board you in the first place.

Related Guides

• Do You Need Proof Of Onward Travel For Costa Rica In 2026?
• Do You Need An Onward Ticket For Bolivia? 2026 Rules
• Do Airlines Check Onward Tickets?

The Bottom Line

A straight trip from the US to Costa Rica needs no yellow fever vaccine. Add Colombia, Peru, Brazil or another risk country to the route and you need the shot at least 10 days before arriving back in Costa Rica. If you live in Costa Rica, the October 2026 expansion means checking your vaccination status before almost any trip to South America.

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