FIPS Code | State | County name | 2003 Rural-urban continuum code | Description | County population 2000 |
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| 34001 | NJ | Atlantic County | 2 | County in metro area of 250,000 to 1 million population | 252,552 | | 34003 | NJ | Bergen County | 1 | County in metro area with 1 million population or more | 884,118 | | 34005 | NJ | Burlington County | 1 | County in metro area with 1 million population or more | 423,394 | | 34007 | NJ | Camden County | 1 | County in metro area with 1 million population or more | 508,932 | | 34009 | NJ | Cape May County | 3 | County in metro area of fewer than 250,000 population | 102,326 | | 34011 | NJ | Cumberland County | 3 | County in metro area of fewer than 250,000 population | 146,438 | | 34013 | NJ | Essex County | 1 | County in metro area with 1 million population or more | 793,633 | | 34015 | NJ | Gloucester County | 1 | County in metro area with 1 million population or more | 254,673 | | 34017 | NJ | Hudson County | 1 | County in metro area with 1 million population or more | 608,975 | | 34019 | NJ | Hunterdon County | 1 | County in metro area with 1 million population or more | 121,989 | | 34021 | NJ | Mercer County | 2 | County in metro area of 250,000 to 1 million population | 350,761 | | 34023 | NJ | Middlesex County | 1 | County in metro area with 1 million population or more | 750,162 | | 34025 | NJ | Monmouth County | 1 | County in metro area with 1 million population or more | 615,301 | | 34027 | NJ | Morris County | 1 | County in metro area with 1 million population or more | 470,212 | | 34029 | NJ | Ocean County | 1 | County in metro area with 1 million population or more | 510,916 | | 34031 | NJ | Passaic County | 1 | County in metro area with 1 million population or more | 489,049 | | 34033 | NJ | Salem County | 1 | County in metro area with 1 million population or more | 64,285 | | 34035 | NJ | Somerset County | 1 | County in metro area with 1 million population or more | 297,490 | | 34037 | NJ | Sussex County | 1 | County in metro area with 1 million population or more | 144,166 | | 34039 | NJ | Union County | 1 | County in metro area with 1 million population or more | 522,541 | | 34041 | NJ | Warren County | 2 | County in metro area of 250,000 to 1 million population | 102,437 |
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