Which Are The OECD Countries?

Which Are The OECD Countries?

As of 2026, the OECD comprises 38 member countries, representing a combined population of over 1.4 billion people and accounting for more than 60% of global GDP.

Geographic Context

Look at the OECD’s footprint—it stretches across five continents. You’ll find high-income powerhouses rubbing shoulders with upper-middle-income up-and-comers, all united by democratic values and open-market policies. From North America’s industrial giants to Europe’s political nerve centers and Asia-Pacific’s turbocharged economies, this group covers some serious ground. That geographic spread lets the OECD push for consistent policies on trade, education, and environmental standards, even when economies couldn’t look more different. The contrast between long-time members like the United States and newer faces like Colombia? That’s the OECD adapting to today’s global stage.

Key Details

Since 2020, the OECD’s been expanding its reach—Colombia joined in 2020, South Africa in 2021. These moves show the group’s pivot toward emerging markets. And let’s not forget the U.S., which still carries the heaviest financial load, covering 25% of the OECD’s annual budget as of 2026 OECD.

OECD Partners vs. Members

Here’s the deal as of 2026: the OECD works with 10 Key Partners (think China, India, Brazil) and 10 regional initiatives. But only full members get to vote on policies. Partners join specific programs without decision-making power. India, for example, teams up on tax transparency and innovation, while China focuses on green growth initiatives.

Interesting Background

The OECD’s story starts in 1948, when 16 European nations created the Organisation for European Economic Co-operation (OEEC) to manage U.S. funds for post-WWII recovery. By 1961, the OEEC became the OECD, with the U.S. and Canada joining the original European crew. The name change marked a shift from post-war rebuilding to broader economic policy coordination. Today, the OECD’s research—like its PISA education rankings—sets global education standards, while its tax policies tackle multinational tax evasion.

The OECD’s Paris headquarters, the Château de la Muette, is a fascinating place. Its 1920s architecture sits side by side with cutting-edge digital tools that governments use to benchmark economic performance. It’s a perfect symbol of the group’s blend of historical weight and modern policy debates.

Policy Impact Highlights

• Tax Transparency: The OECD’s Common Reporting Standard, adopted by 110+ jurisdictions, has recovered over $100 billion in tax revenue since 2017 OECD Tax Transparency.
• Education: PISA rankings have pushed reforms in 70+ countries, including Finland’s rise to global top-performer status.
• Environment: The group’s 2024 climate accord pushed members to align carbon pricing with the Paris Agreement goals.

Practical Information

Heading to Paris? Here’s what you need to know about visiting the OECD headquarters.

• Location: 2 Rue André Pascal, 75016 Paris (48.8588° N, 2.2773° E)
• Access: The nearest metro stations are La Muette (Line 9) or Porte de la Muette (RER C). The building itself isn’t open to the public, but the OECD publishes tons of free data and reports OECD Publications.
• Visiting Tips: Want a tour? Request one through the OECD’s website 3–6 months ahead. Tours cover the château’s 1920s charm and the modern policy labs inside.
• Nearby Attractions: The Seine River (500m away), Trocadéro Gardens (1km), and the Musée Marmottan Monet (2km).

Want to dig into the OECD’s work? Here’s how:

• Data Access: The OECD Data Portal gives you 100,000+ indicators on economies, education, and health. Compare metrics across member countries OECD Data.
• Events: The OECD hosts 500+ conferences every year, including the Global Summit on Responsible Business Conduct (usually in June).
• Membership Inquiries: Non-members can apply for accession by proving they meet OECD standards—think anti-corruption laws and open trade. Recent applicants like Argentina and Romania are in various stages of review.

How many countries are in OECD?

Each member gets a seat at the OECD Council, where they help set the organization’s strategic direction. The Council then guides operations through the OECD Convention. Recent additions like Costa Rica (2021) and Colombia (2020) show how the group keeps expanding beyond its original 20 founding nations. You’ll find everything from economic powerhouses like the U.S. and Germany to up-and-comers like Brazil and Argentina on that list.

Which countries are not in OECD?

That said, a handful of these economies—Brazil, India, China, and South Africa—still take part in OECD programs or hold “Key Partner” status. Smaller economies such as Malaysia, Singapore, and the Philippines usually stay on the outside, though some dip into specific initiatives like tax transparency or education reviews. For the full picture, check the OECD’s official member and partner list.

Is India a member of OECD?

India’s been part of the OECD Development Centre since 1962 and has steadily deepened its involvement. These days, you’ll find Indian officials working on tax policy, innovation, and sustainable development alongside OECD peers. While India doesn’t get a vote at the table, it does follow standards like the Base Erosion and Profit Shifting (BEPS) project. (Imagine being a regular at the clubhouse without the official membership badge.)

Is the US an OECD country?

The U.S. also happens to be the biggest economy—and the largest financial backer—of the OECD, covering nearly a quarter of its annual budget. Membership lets America help shape global responses to issues like climate change, digital trade, and inequality through solid, data-backed policies. Fun detail: the OECD’s headquarters, the Château de la Muette, sits in Paris and serves as the nerve center for policy debates and research.

Is Pakistan a member of OECD?

In 2022, Pakistan joined the OECD’s Multilateral Convention on Mutual Administrative Assistance in Tax Matters, a move aimed at cracking down on tax evasion and avoidance. While it’s not a full member, the convention shows Pakistan’s willingness to play by international tax rules. For businesses or individuals there, that means smoother cross-border tax info sharing and a stronger reputation in global finance circles.

Why is India not part of OECD?

Over the years, India has rolled up its sleeves and joined OECD initiatives like the Guidelines for Multinational Enterprises and the BEPS project. Still, some policymakers hesitate to take the full plunge, worried about signaling alignment with Western economic models or facing pressure to adopt policies that might not fit India’s current stage of development. It’s less about being unfit and more about picking the right speed and terms. Want to follow India’s progress? Keep an eye on updates on the OECD’s India page.

Is Russia a member of OECD?

Before the freeze, Russia took part in 26 OECD bodies and three projects, though its influence never matched that of full members. The suspension kicked in after Russia’s actions in Ukraine, halting collaboration on everything from tax policy to education standards. For now, Russia’s relationship with the OECD is on ice, with no clear path back in sight.

Is China a member of OECD?

You’ll find China involved in the OECD Development Centre and working on topics like innovation, green growth, and tax transparency. It’s more of an advisor than a decision-maker, but the OECD still values China’s input given its status as the world’s second-largest economy. Think of China as the dinner guest who jumps into the conversation but doesn’t get to pick the menu.

Is Mexico an OECD country?

That membership reflects Mexico’s push toward democratic governance and market-friendly policies. Since signing on, Mexico has tweaked its laws to match OECD standards—especially in anti-corruption, education, and tax transparency. It also keeps an eye on the OECD’s Development Assistance Committee (DAC) as an observer, adding its voice to global talks on international cooperation. For Mexico, OECD membership has been a way to modernize its economy and institutions.

Is India a member of IEA?

India earned that status in March 2017, giving it access to the International Energy Agency’s expertise and data without full membership. The IEA, which focuses on energy security and sustainability, works with India on oil stockpiling, renewable energy, and energy efficiency. While India isn’t bound by the IEA’s mandatory rules, its associate role is a stepping stone to deeper involvement. Curious about the details? Check out the IEA’s India partnership page.

What is the most developed country in the world?

Of course, “most developed” depends on what you value—economic output, quality of life, or sustainability. The U.S. usually ranks high on the Human Development Index (HDI) and the Global Innovation Index, but Germany, Japan, and the Nordic countries give it a run for its money with standout education, healthcare, and environmental policies. For the latest rankings, dive into the UNDP’s Human Development Reports.

What is OECD full form?

Based in Paris, the OECD teams up with governments and stakeholders to craft standards and best practices in taxation, education, and environmental sustainability. The name says it all: it’s about cooperation among members and driving economic progress worldwide. For the latest updates, swing by the OECD’s official website.

Which country is not a member of Who?

The WHO counts 194 member states—every UN-recognized country except Liechtenstein. This quirk exists because WHO membership hinges on a country’s ability to carry out its constitution, and Liechtenstein has historically leaned on Switzerland for global health representation. For the full roster, see the WHO’s country directory.

How many countries are in the world?

This count follows the UN’s official list, the global standard for diplomacy and governance. Some regions, like Taiwan or Kosovo, operate independently in practice, but their status remains disputed in the eyes of the UN and many nations. For the latest numbers, check the UN’s country listings.

Why Philippines is not a member of OECD?

Back in 2019, the OECD’s Forum on Harmful Tax Practices flagged the ROHQ regime as potentially unfair, arguing it gave foreign companies an edge over local ones. While the Philippines has pushed ahead with tax reforms, it still hasn’t met the OECD’s full membership bar. The organization keeps urging Manila to realign its policies with global norms, especially on transparency and fair taxation. For progress updates, follow the OECD’s tax transparency initiatives.