▁ancest ries ▁in ▁S ik eston ▁are ▁ 1 7 . 1 % ▁American , ▁ 1 1 . 8 % ▁German , ▁ 1 1 . 5 % ▁Irish , ▁ 6 . 8 % ▁English , ▁ 2 . 9 % ▁French , ▁and ▁ 1 . 5 % ▁Scot ch - I r ish . ▁ ▁There ▁were ▁ 6 , 7 7 9 ▁households ▁out ▁of ▁which ▁ 3 3 . 5 % ▁had ▁children ▁under ▁the ▁age ▁of ▁ 1 8 ▁living ▁with ▁them , ▁ 4 6 . 7 % ▁were ▁married ▁cou ples ▁living ▁together , ▁ 1 7 . 8 % ▁had ▁a ▁female ▁house holder ▁with ▁no ▁husband ▁present , ▁and ▁ 3 2 . 1 % ▁were ▁non - famil ies . ▁ 2 8 . 6 % ▁of ▁all ▁households ▁were ▁made ▁up ▁of ▁individuals ▁and ▁ 1 3 . 1 % ▁had ▁someone ▁living ▁alone ▁who ▁was ▁ 6 5 ▁years ▁of ▁age ▁or ▁older . ▁The ▁average ▁household ▁size ▁was ▁ 2 . 4 5 ▁and ▁the ▁average ▁family ▁size ▁was ▁ 2 . 9 8 . ▁ ▁In ▁the ▁city , ▁the ▁population ▁was ▁spread ▁out ▁with ▁ 2 7 . 6 % ▁under ▁the ▁age ▁of ▁ 1 8 , ▁ 8 . 5 % ▁from ▁ 1 8 ▁to ▁ 2 4 , ▁ 2 6 . 2 % ▁from ▁ 2 5 ▁to ▁ 4 4 , ▁ 2 2 . 2 % ▁from ▁ 4