Flinders Lofty Block is an interim Australian bioregion located in South Australia. It has an area of , which includes the Mount Lofty Ranges and Flinders Ranges.
Flinders Lofty Block consists of six subregions:
The Mount Lofty Ranges and Broughton subregions are part of the Mount Lofty woodlands ecoregion. The other subregions are part of the TirariâÂÂSturt stony desert ecoregion.