Karen Jones of Argyle birdied the par-5 18th hole at her home course yesteray to turn back Sharon Briggs of Montgomery Village, 1 up in the Women's District Golf Association championship.

Jones, who turned 18 in April to become eligible for the women's tournament, became one of the youngest winners in the 58-year history of the event. For Briggs, a weekend golfer who works as an administrative assistant, it was another disappointment. She also was the runner-up in the 1977 tournament, to Sue Keeney.

A fine match, it was made more difficult by the wind, which was gusting at 29 miles per hour and appeared ready at times to blow the 115-pound Jones off the course. But the fragile-looking player consistently outhit her opponent with drives of more than 215 yards.

Jones took a quick lead by winning the first two holes but Briggs won the next two to even the match. From that point on, neither player had more than a one-hole advantage and the match was squarred five times before Jones won on the 18th.

Briggs was 1 up after the first nine but Jones won the 10th when her opponent put her drive out of bounds. Jones missed a six-foot putt for a par on the 11th and went down a hole again. But the home-club player evened the match on the 12th when Briggs missed a short putt and took bogey.

Briggs putted poorly on the 13th and Jones again went 1 up. Briggs got that hole back when she birdied the 14th hole from 18 feet.

Jones went 1 up at the 15th when Briggs put her drive into a creek. The 16th was halved and Briggs evened the match for the last time on the short 17th with a par.

At the 18th, Jones put her 220-yard drive squarely in the middle of the fairway and was on the fringe of the green in two. Briggs was back of a tree with her drive and had to chip out. She also hit to the fringe but was lying three.Jones then chipped to within a foot of the pin for the title.