The course won its title ahead of about 12 other courses entered into the association's competition, which aimed to recognise quality preparation and maintenance of golf courses from Oamaru south.
STMA secretary Bob Steel, of Wanaka, said judges were impressed with the general appearance and neatness of the Alexandra course.
"It's about overall appearance and play of the course, and the way golfers would perceive it," Mr Steel said.
Prestigious golf courses Millbrook and The Hills were not entered in the competition.
Alexandra Golf Club course convener Russell Smith said the award was a special achievement for the club, which relied on volunteer help to maintain its course.
"We are a small club, off the beaten track, and because of that we have less money to spend on the course. Volunteers enable us to do the things other clubs pay to do," he said.
Full-time greenkeeper Barry Nevill and assistant greenkeeper Hugh Clark, who works during seven months of the year, are helped by volunteers who together do the work of at least one and a-half full-time greenkeepers, Mr Smith said.
He said the club had received a lot of praise for its course from golfers during the past year, including those competing in regional championships.
"Playing golf is not just a matter of wanting to play the most difficult, testing course. People get enjoyment out of the environment and quality of the playing surface," he said.
Life member and long-time volunteer of the club Fred Peyton said a team of about 20 regular volunteers helped out at different times, pitching in for working bees on the odd occasion.
Alexandra's award was presented at the Golf Otago awards dinner held in Dunedin recently.
Last year was the first time STMA held the competition, and it was won by the Wanaka Golf Club.
STMA is made up of greenkeepers and turf managers from throughout Otago and Southland.