Kata Kunci: Nahdlatul Ulama, pesantren, kebangsaan, kenegaraan, Indonesia This study focuses on discussing the dynamics of Islamic legal pluralism from time to time, starting from the time of the Prophet, the Companions, to the contemporary era. After conducting an analysis based on the theory of legal pluralism, this study found several findings, first, Islamic legal pluralism is any set of rules or norms that normatively bind human life which are confirmed based on Islamic values, can also take the form of customs or habits but have relevance to religious values.-Islamic values. Second, during the time of the Prophet. The pluralism of Islamic law during the time of Rasulullah SAW was not as developed as in later periods, such as the era of Tabiin, tabi'it-Tabiin, and so on. The source of Islamic law at that time relied directly on the Al-Quran and As-Sunah, if there were problems in society it was immediately reported to the Prophet. Meanwhile, in the Era of Friends, there was an expansion of Islamic territory which brought non-Muslim communities into Islamic rule. This triggers the need for legal arrangements to accommodate the existing diversity. Pluralism of Islamic law during the Tabiin era was considered as an early stage in the development of Islamic law, thus making the face of Islamic law to be as diverse or plural as it is today. Studi ini fokus membahas dinamika pluralisme hukum Islam dari masa ke masa, mulai dari zaman Rasulullah, masa sahabat, hingga di masa kontemporer. Setelah melakukan analisa berdasarkan teori pluralisme hukum, penelitian ini mendapati beberapa temuan, pertama, pluralisme hukum Islam adalah segala perangkat peraturan atau norma yang secara normatif mengikat kehidupan manusia yang dikukuhkan berdasarkan nilai-nilai Islam, dapat juga berbentuk adat atau kebiasaan namun memiliki relevansi dengan nilai-nilai Islam. kedua, pada masa Rasulullah. Pluralisme hukum Islam di masa Rasulullah SAW tidak terlalu berkembang seperti yang ada pada masa-masa selanjutnya, seperti era Tabiin, tabiit-Tabiin, dan seterusnya. Sumber hukum Islam saat itu bersandar secara langsung pada Al-Quran dan As-sunah, jika ada persoalan masyarakat segera dilaporkan kepada Rasulullah. Sedangkan di Era sahabat, terjadilah ekspansi wilayah Islam yang membawa masuknya masyarakat non-Muslim ke dalam kekuasaan Islam. Hal ini memicu perlunya pengaturan hukum untuk mengakomodasi keberagaman yang ada. Pluralisme hukum Islam pada masa Tabiiin dianggap sebagai tahap awal perkembangan hukum Islam, sehingga menjadikan wajah hukum Islam menjadi beragam atau plural seperti sekarang.