Five local companies, whose combined revenues exceed $60 million, were listed by Black Enterprise magazine as among the top 100 black-owned businesses in the country. The companies, all privately held, are primarily service oriented.

"Washington, D.C., is primarily a service-type town," says Waynett A. Sobers, executive vice president of Black Enterprise, "and these companies reflect that."

The five are:

* Sterling Systems Inc., in McLean, Va., a 6-year-old company that offers systems engineering and computer services. The firm has numbered Bechtel and the Defense Department among its clients. With $16.2 million in 1982 revenues, Sterling ranked 41st on the list.

* With $12.8 million in revenues, International Business Services Inc., a District firm that does consulting work in computer software and technology, ranked 57th.

* Blunt Enterprises, the only nonservice company on the list, is a construction firm with revenues exeeding $12.6 million. It ranks 59th.

* Unified Services Inc., based in the District, performs janitorial services for major institutions. "We serve American University and the Kennedy center," says President Jerry Davis Jr., "and we're constantly seeking new business." At $12.5 million in annual revenues, Unified ranked 60th.

* Performing data management, data entry and other forms of information processing services, Raven Systems & Research Inc. ranks 85th, with $8.8 million in revenue.

Most of the local companies listed endured comparatively flat growth last year. But as a whole, according to Black Enterprise, the nation's largest black businesses enjoyed a 14.1 percent growth rate last year with total revenue increasing from $1.9 billion in 1981 to $2.17 billion in 1982.

For the 11th straight year, Motown Industries in Los Angeles, the entertainment company, has kept its No. 1 ranking.

The cut-off point for the Black Enterprise 100 was $7.4 million in revenue.