Niles, like neighboring communities Skokie, Park Ridge and Glenview, grew significantly after veterans of World War II and the Korean War returned home to the Chicago area and established families in the streetcar suburbs. In 1950, Niles had only 3,500 people, but as former farms and nurseries redeveloped into housing, the population tripled in the next five years, then nearly doubled, reaching 18,863 people in 1962. Unlike Park Ridge, Skokie and Glenview, Niles did not have its own commuter rail stop. Residents who did not use their own automobiles to reach their jobs could connect by bus to the Chicago Transit Authority stops at Jefferson Park or the Skokie Swift, or with the Chicago and Northwestern Commuter rail line (incorporated into Metra) in Park Ridge or Glenview or at intervening stops such as Norwood Park and Edison Park (once part of Niles Township until annexed by Chicago). Niles became the first community in Illinois, and one of the first in the United States to establish free ambulance service, in 1946. Several decades later, it instituted a free bus service to connect residents with local shops, government offices and transit options (shown).