As disclosed herein a dynamic geo-fencing method includes receiving a plurality of geo-fence extent factors, a plurality of extents, and a plurality of violation responses for a geo-fence, determining a first geo-fence extent factor of the plurality of geo-fence extent factors, selecting a first extent for the geo-fence corresponding to the first geo-fence extent factor, determining that the geo-fence is violated, and responsive to determining that the geo-fence is violated, performing a violation response, of the plurality of violation responses, corresponding to the first geo-fence extent factor. A corresponding system and computer program product are also disclosed herein.