  union township is a township in tioga county, pennsylvania, in the united states. the population was 945 at the 2000 census. ==geography== according to the united states census bureau, the township has a total area of 47.3&nbsp;square miles (122.5&nbsp;kmÂ²), of which, 47.3&nbsp;square&nbsp;miles (122.4&nbsp;kmÂ²) of it is 
Populated_places_established_in_1803 Townships_in_Pennsylvania Townships_in_Tioga_County,_Pennsylvania