Because of typographical errors, recent circulation figures for The Washington Post were incorrect in a story in yesterday's editions. The garbled paragraph should have read: For the Post, Monday-Friday circulation increased more than 36,500 to more than 598,000; Saturday circulation gained about 33,000 to 558,500 and Sunday circulation was up nearly 21,100 to more than 822,000.

Daily circulation on both The Washington Star and The Washington Post increased in the six months ended March 31, compared with the same period a year earlier, according to pubblishers' statements filed with the Audit Bureau of Circulation.

Monday-Friday circulation of The Star showed the first substantive gain in several years, with an increase of 11,000 more than 340,000. Saturday circulation rose slightly to more than 335,000 and Sunday circulation was up slightly to about 317,000.

For The Post, Monday-Friday Circulation gained about 33,000 to 558,500 and Sunday circulation was up nearly 21,100 to more than 822,000.

Star Publisher George Hoyt said yesterday the new figures "basically show that we've reversed the trend and are on the way up," after five years of declining sales.

He noted that virtually all of the recent daily gains were home-delivery sales in the greater metropolitan area, which he attributed partially to the newspapers five "zoned" editions-metropolitan news sections aimed at specific markets in the District and suburds, Star sales in the city and nearbys suburds actually fell slightly.

"Most of our promotion . . . effort has been on the daily paper," Hoyt added, discussing the relatively flat Sunday paper circulation. Hoyt declined to reveal any plans to boost Sunday sales of the Star, which was acquired more than a year ago by Times Inc.

Compared with a decade ago, Star circulation on Sundays is off about 12 percent while The Post's Sunday circulation has increased 28 percent. Since 1969, daily circulation of The Star has increased 10 percent while Post sales rose 23 percent.

Post Publisher Donald Graham said yesterday the new figures are "a very good sign for Washington newspapers, that readership is up so dramatically . . . Among the large metropolitan areas, Washington already is the highest in per capita (circulation) . . . We at The Post are very pleased."