Jersey City New Jersey is located in Hudson County, with a population over 240 thousand, it is the 2 largest city in New Jersey. Nationwide Windows provides replacement windows, doors installation, vinyl siding and roofing serving Jersey City. If you are looking for a professional home improvement company serving Jersey City NJ, then contact Nationwide Windows today at 1-877-777-4488. Nationwide Windows is a full service provider of new construction and replacement windows. THe organizations door installation provides steel enforced doors as well as vinyl siding and roofing services that will help to reduce your energy costs. Living in Hudson county you should seek out the best home improvement company in the area.