Muslim Islamic groups and churches in the U.S.

Due to the vast scale of Islam in the United States—which includes over 2,700 registered mosques and hundreds of national and local organizations—providing a complete, exhaustive directory of every individual house of worship is not feasible in a single list.
The primary categories, notable national organizations, and resources for comprehensive directory searches include:
Major National Islamic Organizations

• Islamic Society of North America (ISNA): One of the largest umbrella organizations, serving to bring together Muslim communities across North America.
• Islamic Circle of North America (ICNA): An organization focused on education, outreach, and social services.
• Council on American-Islamic Relations (CAIR): A civil rights and advocacy organization.
• Muslim American Society (MAS): A national charitable and educational organization.
• Ahmadiyya Muslim Community USA: A national organization representing the Ahmadiyya Muslim movement across dozens of chapters.

Notable Historical & Major Mosques

• Mother Mosque of America (Cedar Rapids, Iowa): Recognized as the oldest purpose-built mosque standing in the United States (built in 1934).
• Islamic Center of Washington (Washington, D.C.): Opened in 1957, long serving as a major diplomatic and religious hub.
• Islamic Center of America (Dearborn, Michigan): One of the largest mosques in North America, serving a prominent Arab American and Shia Muslim population.
• Diyanet Center of America (Lanham, Maryland): A prominent complex featuring traditional Ottoman architectural design.
• Mosque Maryam (Chicago, Illinois): The headquarters of the Nation of Islam.

Comprehensive Databases & Directories

• Hartford Institute for Religion Research: Maintains the US Mosque Survey database, tracking over 2,700 mosques and Islamic centers by state.
• Salatomatic: A global directory specifically tracking mosques, Islamic centers, and halal places of worship across US towns and cities.