▁United ▁States ▁Census ▁Bureau , ▁the ▁town ▁has ▁a ▁total ▁area ▁of ▁ 0 . 2   square ▁miles ▁( 0 . 6   km ² ), ▁all ▁of ▁it ▁land . ▁ ▁Transport ation ▁The ▁main ▁high ways ▁serving ▁Mad ison ▁are ▁U . S . ▁Route ▁ 2 9 ▁Business ▁and ▁Virginia ▁State ▁Route ▁ 2 3 1 . ▁Through ▁the ▁entire ty ▁of ▁their ▁trip ▁through ▁the ▁town , ▁both ▁high ways ▁follow ▁Main ▁Street . ▁US ▁ 2 9 ▁Bus ▁is ▁the ▁old ▁alignment ▁of ▁U . S . ▁Route ▁ 2 9 , ▁which ▁now ▁by pass es ▁the ▁town ▁just ▁to ▁the ▁sout heast . ▁US ▁ 2 9 ▁extends ▁south west ▁towards ▁Char l ott es ville ▁and ▁n ortheast ▁towards ▁Washington , ▁D . C . ▁SR ▁ 2 3 1 ▁extends ▁sout heast ▁towards ▁Orange ▁and ▁north west ▁towards ▁S per ry ville . ▁ ▁Dem ograph ics ▁ ▁As ▁of ▁the ▁census ▁of ▁ 2 0 0 0 , ▁there ▁were ▁ 2 1 0 ▁people , ▁ 1 0 9 ▁households , ▁and ▁ 5 7 ▁families ▁living ▁in ▁the ▁town . ▁The ▁population ▁density ▁was ▁ 9 6 1 . 4 ▁people ▁per ▁square ▁mile ▁( 3 6 8 . 6 / km ²). ▁There ▁were ▁ 1 1 5 ▁housing ▁units ▁at ▁an ▁average ▁density ▁of ▁ 5 2 6 . 5 ▁per ▁square ▁mile ▁( 2 0 1 . 8 / km ²). ▁The ▁ra cial ▁make up ▁of