The NBC-USA shares core Baptist theology — the authority of Scripture, salvation by grace through faith, believer's baptism by immersion, and congregational autonomy — but is distinguished by its deep rootedness in the Black church tradition. The Black church has functioned historically as more than a religious institution: sanctuary, school, civic organization, and the organizational backbone of the Civil Rights Movement. Leaders including Adam Clayton Powell Jr. and the broader network from which Rev. Dr. Martin Luther King Jr. emerged shaped American public life from its pulpits and church basements.

The prophetic tradition remains a distinctive feature of NBC-USA preaching: sermons frequently address justice, economic dignity, and the condition of Black communities alongside personal salvation and holiness. Governance is congregational; the convention is a voluntary fellowship of independent churches with a president elected by delegates at the annual session.

By most estimates the convention claims approximately 7–8 million members across some 31,000 congregations. Churches are concentrated in the South — Mississippi, Alabama, Georgia, Louisiana, Texas — and in major Northern cities where Black Southerners migrated during the Great Migration: Chicago, Detroit, New York, Philadelphia, and Cleveland.

A visitor will experience one of the most musically rich worship traditions in American Christianity. Gospel music — spirituals, anthems, contemporary gospel — is central, not incidental. Sermons are delivered in a call-and-response tradition, often building in cadence and intensity. Services run two hours or more. Fellowship ties are typically multigenerational. The NBC-USA represents one of the most consequential institutions in American history — to understand American music, the Civil Rights Movement, or the social fabric of Black communities across the 20th century, one must understand the Black church at its center.