0 th ▁century ▁due ▁to ▁coal ▁mines ▁nearby . ▁ ▁History ▁ ▁N ó gr ád ▁(- H ung arian , ▁in ▁Latin : ▁com it atus ▁Ne og rad i ensis , ▁in ▁German : ▁Ne ub urg ▁or ▁Ne og rad , ▁in ▁Slov ak : ▁Nov o hr ad ) ▁was ▁also ▁the ▁name ▁of ▁a ▁historic ▁administrative ▁county ▁( com it atus ) ▁of ▁the ▁Kingdom ▁of ▁Hung ary . ▁The ▁name ▁st ems ▁from ▁the ▁former ▁N ó gr ád ▁castle ▁( ▁- ▁this ▁name ▁is ▁still ▁used ▁in ▁Slov ak ia ▁as ▁well ▁as ▁the ▁inform al ▁design ation ▁of ▁the ▁corresponding ▁territory , ▁now ▁located ▁in ▁southern ▁Slov ak ia ▁and ▁in ▁northern ▁Hung ary ). ▁ ▁Dem ograph ics ▁ ▁In ▁ 2 0 1 5 , ▁it ▁had ▁a ▁population ▁of ▁ 1 9 5 , 9 2 3 ▁and ▁the ▁population ▁density ▁was ▁ 7 7 / km ². ▁ ▁Eth nic ity ▁Besides ▁the ▁Hung arian ▁majority , ▁the ▁main ▁minor ities ▁are ▁the ▁Roma ▁( approx . ▁ 1 5 , 0 0 0 ), ▁Slov ak ▁( 2 , 5 0 0 ) ▁and ▁German ▁( 1 , 0 0 0 ). ▁ ▁Total ▁population ▁( 2 0 1 1 ▁census ): ▁ 2 0 2 , 4 2 7 ▁Eth nic ▁groups ▁( 2 0 1 1 ▁census ): ▁Ident ified ▁themselves : ▁ 1 9 2 , 4 3 8 ▁persons : ▁Hung ari ans : ▁ 1