▁population ▁was ▁ 1 2 4 ▁at ▁the ▁ 2 0 1 0 ▁census , ▁down ▁from ▁ 1 6 0 ▁at ▁the ▁ 2 0 0 0 ▁census . ▁It ▁was ▁named ▁for ▁early ▁Jefferson ▁County ▁sett ler ▁E lij ah ▁He ath . ▁ ▁Geography ▁He ath ▁Township ▁is ▁in ▁northern ▁Jefferson ▁County , ▁border ed ▁to ▁the ▁north ▁by ▁El k ▁County . ▁The ▁Clar ion ▁River , ▁a ▁west - flow ing ▁trib ut ary ▁of ▁the ▁Al leg hen y ▁River , ▁forms ▁the ▁northern ▁border ▁of ▁the ▁town ship ▁and ▁the ▁county ▁line . ▁The ▁town ship ▁includes ▁the ▁un in cor por ated ▁community ▁of ▁Dutch ▁Hill . ▁ ▁According ▁to ▁the ▁United ▁States ▁Census ▁Bureau , ▁the ▁town ship ▁has ▁a ▁total ▁area ▁of ▁, ▁of ▁which ▁ ▁are ▁land ▁and ▁, ▁or ▁ 1 . 2 5 %, ▁are ▁water . ▁ ▁Dem ograph ics ▁ ▁As ▁of ▁the ▁census ▁of ▁ 2 0 0 0 , ▁there ▁were ▁ 1 6 0 ▁people , ▁ 7 7 ▁households , ▁and ▁ 4 9 ▁families ▁res iding ▁in ▁the ▁town ship . ▁The ▁population ▁density ▁was ▁ 5 . 6 ▁people ▁per ▁square ▁mile ▁( 2 . 2 / km ²). ▁There ▁were ▁ 7 0 7 ▁housing ▁units ▁at ▁an ▁average ▁density ▁of ▁ 2 4 . 7 / sq   mi ▁( 9 . 5 / km ²). ▁The ▁ra cial ▁make up ▁of ▁the ▁town ship ▁was ▁ 9 8 .