By December, North Charleston had become the fourth-largest city in the state after annexing the Naval Base, the Air Force Base and the Charleston International Airport.
In February 1973, North Charleston doubled its area through annexation, and in March expanded into Berkeley County.
The North Charleston Coliseum opened, and the South Carolina Stingrays of the ECHL began play later that year.
The Charleston Naval Base ranked as the largest employer of civilians in South Carolina into the 1990s.
By 1986, North Charleston's population had reached 78,000 residents spanning 47 square miles (120 km).