Marriott Corp. officials said yesterday the company is considering offers by industrial developers to buy its 65-acre Great America amusement park in California's Silicon Valley.

Increasing land values and dissapointing profits from the Santa Clara, Calif., theme park combined to make the company consider an unsolicited offer for the land, spokesman Terry Souers said. The company would not disclose details of the offer.

Reports that the park might be redeveloped as an industrial site prompted the Santa Clara city council to form a commission to investigate alternative uses for the land. The city, expected to report Aug. 30, is studying the possibility of buying and operating the park or contracting with Marriott to run it.

When the Santa Clara park opened in 1976, the company predicted it would eventually attract 3.5 million visitors a year. Attendance peaked at 2.5 million in 1978, however, and has dropped since then.

Souers said the park had been profitable, though less profitable than anticipated. "We've been making money on it. I think we've made money on it every year," he said.

Land in the area has recently sold for approximately $900,000 an acre. The area is heavily populated by rapidly growing computer technology firms. In recent months, offers for the land became more serious and more substantive, Souers said.

No matter what the ultimate disposition of the land is, the park will be open through the 1984 season, he said.

Marriott, which operates hotels, motels and restaurants, also operates an another amusement park near Chicago.

United Press International yesterday quoted Santa Clara Mayor William Gissler as saying he thinks the city should buy and operate the park as it is. "It is a profitable operation now," Gissler said. "It just isn't profitable to the level Marriott is expecting on its investments."