▁Township ▁to ▁the ▁west . ▁U . S . ▁Route ▁ 1 1 / 1 5 ▁serves ▁as ▁the ▁primary ▁transport ation ▁routes ▁for ▁Mary sv ille ▁residents . ▁ ▁Dem ograph ics ▁ ▁As ▁of ▁the ▁census ▁of ▁ 2 0 0 0 , ▁there ▁were ▁ 2 , 3 0 6 ▁people , ▁ 1 , 0 2 7 ▁households , ▁and ▁ 6 3 5 ▁families ▁res iding ▁in ▁the ▁bor ough . ▁The ▁population ▁density ▁was ▁ 9 6 6 . 8 ▁people ▁per ▁square ▁mile ▁( 3 7 2 . 5 / km ²). ▁There ▁were ▁ 1 , 1 0 3 ▁housing ▁units ▁at ▁an ▁average ▁density ▁of ▁ 4 6 2 . 4 ▁per ▁square ▁mile ▁( 1 7 8 . 2 / km ²). ▁The ▁ra cial ▁make up ▁of ▁the ▁bor ough ▁was ▁ 9 8 . 4 4 % ▁White , ▁ 0 . 1 7 % ▁African ▁American , ▁ 0 . 0 9 % ▁Asian , ▁ 0 . 2 2 % ▁from ▁other ▁races , ▁and ▁ 1 . 0 8 % ▁from ▁two ▁or ▁more ▁races . ▁His pan ic ▁or ▁Lat ino ▁of ▁any ▁race ▁were ▁ 0 . 2 2 % ▁of ▁the ▁population . ▁ ▁There ▁were ▁ 1 , 0 2 7 ▁households , ▁of ▁which ▁ 2 5 . 0 % ▁had ▁children ▁under ▁the ▁age ▁of ▁ 1 8 ▁living ▁with ▁them . ▁ 4 6 . 7 % ▁were ▁married ▁cou ples