Municipal Population and Trends Sussex County, 1990-2010 Municipality Census Change 1990 2000 2010 1990-2000 2000-2010 1990-2010 20 Years Sussex County 130,943 144,166 149,265 +13,223 +5,099 +18,322 +14% Andover Borough 712 658 606 -54 -52 -106 -15% Andover Township 5,424 6,033 6,319 +609 +286 +895 +16% Branchville Borough 851 845 841 -6 -4 -10 -1% Byram Township 8,109 8,254 8,350 +145 +96 +250 +3% Frankford Township 5,114 5,420 5,565 +306 +145 +451 +9% Franklin Borough 4,977 5,160 5,045 +183 -115 +68 +1% Fredon Township 2,763 2,860 3,437 + 97 +577 +674 +24% Green Township 2,709 3,220 3,601 +511 +381 +892 +33% Hamburg Borough 2,566 3,105 3,277 +539 +172 +711 +28% Hampton Township 4,438 4,943 5,196 +505 +253 +758 +17% Hardyston Township 5,275 6,171 8,213 +896 +2042 +2,938 +56% Hopatcong Borough 15,586 15,888 15,147 +302 -741 -439 -3% Lafayette Township 1,902 2,300 2,538 +398 +238 +636 +33% Montague Township 2,832 3,412 3,847 +580 +435 +1,015 +36% Newton, Town of 7,521 8,244 7,997 +723 -247 +476 +6% Ogdensburg Borough 2,722 2,638 2,410 - 84 -228 -312 -11% Sandyston Township 1,732 1,825 1,998 + 93 +173 +266 +15% Sparta Township 15,098 18,080 19,722 +2,982 +1,642 +4,624 +31% Stanhope Borough 3,398 3,584 3,610 +186 +26 +212 +6% Stillwater Township 4,253 4,267 4,099 +14 -168 -154 -4% Sussex Borough 2,201 2,145 2,130 - 56 -15 -71 -3% Vernon Township 21,211 24,686 23,943 +3,475 -743 +2,732 +13% Walpack Township 67 41 16 - 26 -25 -51 -76% Wantage Township 9,487 10,387 11,358 +900 +971 +1,871 +20% Sussex County 130,943 144,166 149,265 +13,223 +5,099 +18,322 +14% Sources: U.S. Census Bureau