Figurines for everyone! Unique estate doo-dads and quality stuff. Old junk, collectibles, heavy furn. and dusty merch.

It's all on the block this weekend at a number of antique shows, beginning with the MONTGOMERY COUNTY HISTORICAL SOCIETY's spread at the Rockville Civic Center Mansion (at Edmonston Drive and Baltimore Road). The show's open Saturday noon to 9, Sunday noon to five; cost of admission is $2.50. Among the more unusual items: a pair of 18th-century English knife boxes, a bow-front Hepplewhite chest of drawers, shield-back chairs, antique Amish quilts, coin silver and a miniature 1700s Queen Anne game table.

St. John's Episcopal Church at 9801 Livingston Road Oxon Hill, holds its 11th annual ANTIQUES SHOW this Friday, 11 to 8, and Saturday 10 to 6. Besides local dealers' collectibles, antique appraisals, spinning and dyeing demonstrations and homecooked meals, it offers guided tours of the historic colonial church where George Washington reportedly worshiped. Cost of admission is $1.50; for details call 839-2648.

Arlington Community Residences Inc. will hold its second annual ART AUCTION Saturday evening at 8, after a one-hour preview, at the American Legion Hall, 3445 North Washington Boulevard. Oils, watercolors, sculptures, enamels, etchings, lithographs and other graphics are up for opening bids ranging from $20 to $75. The $3 admission fee will benefit mentally handicapped Arington County adults.

In Georgetown, the 28th annual SIDEWALK ART SHOW will be held Friday and Saturday, 11 to 7, outside the Georgetown Presbyterian Church at 3115 P Street NW. Admission is $1.50. Special categories this year are religious and children's art.

On Sunday, The Women's Club of Our Lady of Good Counsel Parish will sponsor an INTERNATIONAL ART EXHIBIT AND AUCTION at the parish school, Notre Dame Drive, Vienna. The auction will begin at 8 after a one-hour preview; admission is $3.

Anyone trekking to Southern Maryland should note the Smithville United Methodist Church of Dunkirk's ANTIQUE SHOW Saturday, 11 to 9, and Sunday, 12:30 to 6, at the National Guard Armory in Prince Frederick. Nine lectures (on topics such as refinishing, preserving and decorating with antiques) complement the antiques from 30 dealers.Admission is $1.75 for adults. (Take Capital Beltway Exit 11 to Maryland Route 4, then go south for 32 miles to Prince Frederick and Armory Road.)