EntityQ1014338· pop 34· linked from 226 articlesMountainsideSign in to saveborough in Union County, New Jersey, United StatesConnectionsrace and ethnicity in the United States CensusEntityEastern Time ZoneEntityWinfield TownshipEntityUnited StatesCountryBarack ObamaPersonNew York CityCityHelsinkiEntityGeorge W. BushPersonmarriageEntityNew JerseyEntitytime zoneEntityMelbourneCityactorEntitygeographic coordinate systemEntityInternational Standard Book NumberEntityRepublican Party (United States)ConceptmayorEntitypopulation densityEntityDemocratic Party (United States)ConceptU.S. stateEntityCategories1895 establishments in New JerseyBoroughs in New JerseyBoroughs in Union County, New JerseyFaulkner Act (mayor–council)Mountainside, New JerseyPopulated places in the United States established in 1895