  humphreys county is a county located in the u.s. state of tennessee. as of the 2010 census, the population was 18,538. its county seat is waverly. ==history== humphreys county was established in 1809 from parts of stewart county, and named for judge (and future congressman) parry wayne humphreys. the county seat was initially located at reynoldsburg, near the mouth of dry creek. when the western half of the county was split off to form benton county in 1835, the seat was moved to the more centrally located waverly. during the civil war, the battle of johnsonville took place in the western half of the county. the remnants of the battle site are the focus of johnsonville state historic park. ==geography== according to the u.s. census bureau, the county has a total area of , of which  is land and  (4.6%) is water.{{cite web|url=http://www.census.
1809_establishments_in_the_United_States Humphreys_County,_Tennessee Populated_places_established_in_1809 Tennessee_counties