The White House announced yesterday that two tiny polyps removed from President Reagan's intestine Friday during a routine post-operative checkup were found to be noncancerous.

Presidential physician T. Burton Smith said in a written statement that the two polyps, between 1 and 1 1/2 millimeters in size, were found benign in laboratory tests.

Reagan was informed of the results yesterday while resting at Camp David.

The polyps were found during a colonoscopy, a procedure in which doctors examine the inside of the large intestine through a special scope.

Doctors at Bethesda Naval Medical Center performed the colonoscopy as a routine followup to Reagan's surgery for intestinal cancer last July. Three benign polyps similar in size to those removed Friday were excised during a colonoscopy in January.

Also Friday Reagan underwent blood tests, X-rays, CAT scans, an eye checkup and an examination of his nose, site of a skin cancer last year. Smith said results of these tests were normal.

Reagan departs Tuesday for a six-day vacation at his California ranch.

Dr. Donald A. O'Kieffe, a gastroenterologist and associate clinical professor at George Washington University Medical School, said Friday after the surgery that the finding of additional polyps was "not unexpected." O'Kieffe added that periodic removal of such growths as they appear "is going to prevent any problems in terms of cancer of the colon."

He said the colonoscopy also allowed Reagan's physicians to check the area of the right side of his colon where a large malignant tumor was removed last July to make sure there was no sign of recurrent cancer. After the operation last year, doctors said Reagan should have the test every six months.

According to the White House, the medical team conducting the colonoscopy included Drs. Dale Oller and Edward Cattau, members of the team that examined Reagan at the naval hospital last year and performed his intestinal surgery.