What is the oldest written constitution? – What to know and how scholars decide

Quick answer and how to read this article

Short summary of the practical answer, first written constitution in america

Short practical answer first: for the oldest constitution still in force as the founding framework of a sovereign state, San Marino’s statutes, commonly dated to 1600, are the usual reference. Encyclopaedia Britannica identifies San Marino’s constitutional tradition as exceptionally long lived, which explains why many reference works present it as the oldest surviving constitutional framework Encyclopaedia Britannica on San Marino.

Second practical answer for an American context: the Fundamental Orders of Connecticut, adopted in 1639, are widely described by state libraries and reference works as an early written constitutional framework in colonial North America Connecticut State Library on the Fundamental Orders of Connecticut.

This article will show why several documents can all be called ‘oldest’ depending on how one defines the phrase “written constitution”. It separates definitional options, gives the primary references used, and offers a simple checklist readers can apply when sources disagree.

Primary reference entries used in this article include the Encyclopaedia Britannica entry on San Marino, the Connecticut State Library record, the Encyclopaedia Britannica entry on the Fundamental Orders, the Avalon Project transcription of Corsica’s 1755 constitution, and archival information from San Marino’s official documents, together with a discussion of definition from comparative scholarship Encyclopaedia Britannica on San Marino.

What scholars mean by a “written constitution”

Different scholarly definitions and their implications

Scholars do not always use the same test for what counts as a written constitution. Some scholars and reference sources treat a constitution as a single codified text that lays out the organization of government and basic rights. Others accept a body of statutes, charters, and customary rules that together function as a constitutional framework. The Conversation’s discussion of comparative definitions explains how different choices about codification and scope change which historical documents qualify as a constitution The Conversation on what counts as a constitution.

Three criteria often matter in practice: whether the text is a single codified document or a set of statutes, whether the rule(s) have continued in force without substantial interruption, and the political status of the entity the text governs, for example a sovereign state versus a colony. These criteria are reasons why San Marino’s statutes and the Fundamental Orders of Connecticut can both be important answers under different definitions.

When sources disagree, stating the working definition up front is essential. If you define a constitution strictly as a single codified charter adopted by a sovereign state and still in force, San Marino’s statutes are the natural answer. If you define the term more broadly to include written frameworks used by colonial governments in North America, the Fundamental Orders of Connecticut appear as the earliest written framework in the territory that became the United States.

Oldest constitution still in force: San Marino (1600)

What the San Marino statutes are and how they function today

The Statutes of San Marino, commonly dated to 1600, are a set of laws and institutional rules that later generations have treated as part of the republic’s constitutional tradition. Reference works identify this body of statutes as the oldest constitutional framework still functioning for a sovereign state Encyclopaedia Britannica on San Marino.

In practical terms, calling the San Marino statutes a ‘constitution’ rests on accepting a broad definition: a body of written rules and statutes that has guided the organization of government over centuries and that remains part of the country’s legal and institutional history. San Marino’s national archives and official documentation present those statutes as foundational to the republic’s constitutional history Republic of San Marino official constitutional documents.

Why do reference works single out San Marino? Part of the reason is continuity. San Marino has a long recorded set of institutional texts and practices that trace back to the early modern period and that have been presented by official sources and encyclopedias as a continuous constitutional tradition. The claim depends on seeing the statutes as a coherent set of rules governing the state’s basic organization.

A limitation to note when using San Marino as the answer is definitional: if one requires a modern single-text constitution, or if one excludes small polities or requires uninterrupted application of a fixed code, then San Marino’s claim may be framed differently. The article’s checklist below helps readers decide which framing they prefer.

Earliest written constitutional framework in colonial America: Fundamental Orders of Connecticut (1639)

What the Fundamental Orders contain and who used them

The Fundamental Orders of Connecticut, adopted in 1639, set out a structure for government in the Connecticut River towns and are widely described by the Connecticut State Library and reference works as an early written constitutional framework in colonial North America Connecticut State Library on the Fundamental Orders of Connecticut. Additional archival discussion appears on the Connecticut official historical antecedents page portal.ct.gov and in local history summaries Connecticut History.

The Orders provided rules for choosing magistrates and for assembling a general court and have been used by historians and state institutions to illustrate how New England settlements developed written arrangements for self-government. Encyclopaedia Britannica also covers the Orders as a noteworthy early example of a written colonial framework and other reference compilations discuss the Orders as an early constitutional text Encyclopaedia Britannica on the Fundamental Orders of Connecticut, and encyclopedic overviews are available in specialist sites Federalism.org entry.

The Fundamental Orders differ from the San Marino statutes in important ways. They were adopted by colonial communities rather than a sovereign state, and their historical role is best understood within the context of New England colonial governance. For readers asking about the first written constitution in America, the Fundamental Orders are the most-cited candidate because they predate other colonial charters that set out government arrangements. See also our post on America’s first constitution for more context America’s first constitution.

When citing the Fundamental Orders, make clear whether you mean ‘first in colonial North America’ or ‘first overall’ because those are different claims. The Connecticut State Library and reference works usually frame the Orders precisely as an early colonial constitution rather than as a continuing national constitution.

Other notable early examples: Corsica (1755) and the role of Magna Carta

Corsica’s 1755 constitution and its place in constitutional history

Corsica’s 1755 constitution, drafted under Pasquale Paoli, is often cited in scholarly literature as one of the first modern republican constitutions and as influential for later constitutional thought. The Avalon Project provides a transcription and historical notes for this text and scholars reference it when discussing early modern republican designs Avalon Project text and notes for Corsica 1755.

Paoli’s constitution combined institutional rules with a republican rhetoric that scholars see as an important precursor to later constitutions. Its significance is partly comparative: it helped show how Enlightenment ideas about representation and separation of powers were being translated into written constitutions before the American and French constitutions of the later 18th century.

Why Magna Carta is a precursor but not a modern constitution

The Magna Carta of 1215 is a vital legal charter in English law and a constitutional precursor. Modern scholarship treats it as an important source for later constitutional ideas but not as a comprehensive written constitution in the modern sense, because it is a royal charter that addresses specific grievances rather than a single codified constitution for a polity The Conversation on constitutional definitions.

In short, Magna Carta belongs in the category of foundational legal documents that shaped constitutional thought, but it does not fit cleanly into the contemporary category of a written constitution that organizes government and rights as a single framework.

How to weigh competing claims: decision criteria for readers

Checklist readers can use when sources disagree

When sources offer competing claims about which text is the ‘oldest’, use a short checklist to decide which claim fits your purpose. Key questions include whether you require a single codified text, whether continuous legal force matters, whether the polity must be a sovereign state, and whether regional or colonial frameworks qualify. The Conversation’s overview of definitional issues can help when you apply the checklist to specific historical documents The Conversation on what counts as a constitution.

Apply the checklist like this: if your goal is to identify the oldest constitution still in force for a sovereign state, choose texts that show continuity and sovereign application. If your goal is to identify the first written framework in a geographic area that later became a nation, include colonial charters and orders if they meet your criteria.

Examples show how the checklist changes outcomes. Using the checklist that prioritizes continuous force and sovereign status points to San Marino’s statutes. Using a checklist that accepts colonial written frameworks points to the Fundamental Orders of Connecticut. Stating which checklist you used makes your claim precise and verifiable.

Common mistakes and how to avoid them

Mixing constitutional precursors with full constitutions

A common mistake is to conflate foundational legal charters like Magna Carta with modern constitutions. Magna Carta is historically important but treating it as the ‘oldest constitution’ without qualification can be misleading, because it does not operate as a single-text constitution organizing a modern state The Conversation on constitutional categories.

Another common error is failing to state whether you mean ‘still in force’ or ‘first in a geographic area’. Those are different claims and they require different evidence. Avoid overstatement by attributing the claim to a specific source and by citing the relevant reference for the document you name.

Conclusion and where to read primary sources

Practical closing answer and recommended primary sources

Practical closing answer, stated plainly: for the oldest constitution still in force as a sovereign state’s constitutional framework, reference works typically identify San Marino’s statutes dated to around 1600 Encyclopaedia Britannica on San Marino. For the earliest written constitutional framework in colonial North America, the Fundamental Orders of Connecticut, adopted in 1639, are the most commonly cited example Connecticut State Library on the Fundamental Orders of Connecticut. Corsica’s 1755 constitution remains an important early republican example in comparative histories Avalon Project text of Corsica’s 1755 constitution.

When you cite these claims, make your definition explicit. If you need language for citation, use a sentence such as: ‘Reference works commonly identify San Marino’s 1600 statutes as the oldest constitutional framework still in force, while the Fundamental Orders of Connecticut (1639) are described as the earliest written constitutional framework in colonial North America.’ Then list the reference entries used in your work. More about the author is available on the site About.