 ossian is a town in livingston county, new york, united states. the population was 789 at the 2010 census. ossian is a figure in celtic mythology. the town of ossian is the southernmost town in livingston county and is in the southeast part of the county. == history == the area was first settled around 1804 near ossian center. the town of ossian was formed from the town of angelica, while part of allegany county. ossian became part of livingston county in 1856. ==geography== according to the united states census bureau, the town has a total area of , of which,  of it is land and {{convert|0.04|sqmi|
Rochester,_New_York_metropolitan_area Towns_in_Livingston_County,_New_York Towns_in_New_York