The Women's 100 metre freestyle event at the 2009 Maccabiah Games took place on 19 July at the Wingate Institute. This swimming event used freestyle swimming, which means that the method of the stroke is not regulated (unlike backstroke, breaststroke, and butterfly events). Nearly all swimmers use the front crawl or a variant of that stroke. Because an Olympic size swimming pool is 50 metres long, this race consisted of two lengths of the pool.
Three heats were held. The heat in which a swimmer competed did not formally matter for advancement, as the swimmers with the top eight times from the entire field qualified for the finals.
Nations with three or more swimmers meeting the standard could enter only three such swimmers in the final.
Records
Prior to this competition, the existing Maccabiah record was as follows.
The following new Maccabiah records were set during this competition.