A field survey was conducted principally during the summers of 1980 through 1982 in all 39 counties and both physiographic provinces of middle Tennessee. Eight species of planarians, representing four families, were found in 26 counties and at 124 sites: 60 in the Central Basin province and 64 in the Highland Rim province.Dugesia tigrinaoccurred at more sites (31) than any other species and was most often in the Central Basin.Dugesia dorotocephalaandCurs foremaniiwere found in 26 and 19 sites, respectively, and were about equally distributed between the two provinces.Phagocata gracilisoccurred at 18 sites, and more of these sites (16) were in the Highland Rim. Of 16 sites forPhaocata morgani, one-half were springs located mostly in the Highland Rim.Phagocata velataoccupied 10 sites, all in the Central Basin. New records forProcotyla fluviatiliswere established at two sites in the Highland Rim.Sphalloplana chandleri, a cave planarian, occurred at two sites, one in each province. Triclads were abundant (50–100 in 20 min. or less) or very abundant (>100) at seven sites: one site each forD. dorotocephalaandD. tigrina, and two sites forPh. gracilis, all in the Highland Rim; and, one site each forD. dorotocephala, D. tigrina, andPh. velata, all in the Central Basin. Data on water temperature, calcium, pH, and substrate are included.