Sharia law is an Islamic legal system derived from the Quran and Hadiths that governs personal conduct, family matters, criminal justice, and economic life. In AP Comp Gov, it is the legal foundation of Iran's theocracy and operates alongside secular law in Nigeria's twelve northern states.
Sharia law is a legal system built from Islamic religious sources, mainly the Quran and the Hadiths (recorded sayings and actions of the Prophet Muhammad). It covers far more than what most Western legal systems do. Family law, criminal punishment, banking and contracts, and rules of personal conduct all fall under its scope.
For AP Comp Gov, Sharia matters in two course countries, and they use it very differently. In Iran, Sharia is the basis of the entire regime. After the 1979 Revolution, Iran transitioned from dictatorial rule under the Shah to a theocracy grounded in Islamic Sharia law, and judges in Iran's judiciary must be trained in it. In Nigeria, Sharia is regional, not national. Twelve northern states with Muslim majorities apply Sharia courts alongside the secular federal court system, which makes Sharia a live example of federalism and religious cleavage at the same time. Same legal tradition, two completely different roles in the political system. That contrast is exactly the kind of comparison the exam loves.
Sharia law is one of the most cross-cutting concepts in the course because it touches all three of the first units. In Unit 1, it grounds AP Comp Gov 1.5.A, which asks you to explain sources of power and authority, and the CED specifically names Iran's post-1979 transition to a theocracy based on Islamic Sharia law as the example. In Unit 2, it supports AP Comp Gov 2.8.A on judiciaries, since the Iranian judiciary's major function is ensuring the legal system follows religious law, and judges must be trained in Sharia. In Unit 3, it feeds AP Comp Gov 3.2.A (religion shaping political culture) and AP Comp Gov 3.8.A and 3.9.A, where Nigeria's Muslim north and Christian south form a religious cleavage that affects voting, party systems, and political stability. If you can explain Sharia in Iran versus Sharia in Nigeria, you can answer questions about religion as a source of authority, judicial independence, federal versus unitary systems, and social cleavages, all with one well-understood term.
Keep studying AP Comparative Government Unit 3
Theocracy (Unit 1)
Iran is the course's one theocracy, and Sharia is the legal machinery that makes it one. Religious law isn't just an influence on Iranian government; it is the standard every law and judge must meet, with the Supreme Leader appointing the head of the judiciary to enforce it.
Federal and Unitary Systems (Unit 1)
Nigeria's federalism is what lets twelve northern states run Sharia courts while the national legal system stays secular. Iran, a unitary state, applies Sharia uniformly from the top down. The same law looks regional in a federal system and national in a unitary one.
Boko Haram (Unit 3)
The CED notes that even stable regimes face radical religious elements that grow out of long-standing cleavages. Boko Haram emerged from northern Nigeria's religious divide and demands a stricter version of Islamic law, showing how the Sharia question connects to terrorism, legitimacy, and state stability.
Judicial Systems (Unit 2)
Iran's requirement that judges be trained in Sharia is the clearest example in the course of a judiciary built to serve religion rather than act as an independent check. Compare it to China's rule by law, where the judiciary serves the party instead. Neither judiciary is independent, but they answer to very different masters.
Sharia shows up in multiple-choice questions about Iran's judiciary (why judges must be trained in Sharia, what makes Iran's judicial system distinct from other course countries) and about Nigeria (how religious diversity shapes political culture, and how Sharia courts coexisting with federal courts illustrates federalism). On the FRQ side, it's prime material for comparison questions. The 2021 SAQ asked you to compare civil liberties protections across two course countries, and the 2025 SAQ asked you to compare limits on judicial power, and Iran's Sharia-based judiciary works as strong evidence for both. The move to practice is using Sharia as evidence, not just naming it. Don't write "Iran has Sharia law." Write that Iran's judiciary exists to keep the legal system consistent with religious law, that the Supreme Leader appoints its head, and that this limits judicial independence compared to a country like the UK.
Sharia is a body of law; theocracy is a type of regime. Iran is a theocracy because religious authorities hold ultimate political power, and Sharia is the legal system they govern through. The two aren't interchangeable. Nigeria proves it: twelve Nigerian states apply Sharia law, but Nigeria is a federal democracy, not a theocracy, because religious leaders don't control the national government.
Sharia law is an Islamic legal system drawn from the Quran and Hadiths that covers personal conduct, family matters, criminal justice, and economic transactions.
After the 1979 Revolution, Iran transitioned from dictatorial rule to a theocracy based on Islamic Sharia law, making religion a core source of power and authority (LO 1.5.A).
Iran's judiciary exists mainly to keep the legal system consistent with religious law, so judges must be trained in Sharia and the head of the judiciary is appointed by the Supreme Leader (LO 2.8.A).
In Nigeria, twelve northern states apply Sharia law alongside secular federal courts, which makes Sharia an example of both federalism and religious cleavage in one country.
Nigeria's north-south religious divide over issues like Sharia shapes voting behavior and party systems, and radical groups like Boko Haram grew out of that long-standing cleavage (LOs 3.8.A, 3.9.A).
A country can use Sharia law without being a theocracy; Nigeria does, Iran is, and that distinction is exactly what comparative questions test.
Sharia law is an Islamic legal system derived from the Quran and Hadiths that governs personal conduct, family law, criminal justice, and economic life. In the course, it matters most in Iran, where it forms the legal basis of the theocracy, and in Nigeria, where twelve northern states apply it alongside secular courts.
No. Sharia applies in twelve Muslim-majority northern states, while Nigeria's national legal system remains secular. This is possible because Nigeria is a federal state, so states have a degree of legal autonomy, and it's a major source of the country's north-south religious cleavage.
Sharia is a legal system; theocracy is a regime type where religious authorities hold political power. Iran is a theocracy that governs through Sharia, but Nigeria applies Sharia in some states while remaining a federal democracy, so having Sharia law does not automatically make a country a theocracy.
Because the Iranian judiciary's main function is making sure the legal system stays based on religious law. The head of the judiciary is appointed by the Supreme Leader, which keeps the courts aligned with the theocratic regime rather than acting as an independent check.
It works as evidence for comparisons of judicial power and civil liberties, both of which have appeared as released SAQs (2021 on civil liberties, 2025 on limits on judicial power). For example, you could contrast Iran's Sharia-trained, Supreme Leader-appointed judiciary with the UK's more independent courts.