Site Navigation Alabama Florida Georgia Louisiana Mississippi North Carolina South Carolina Tennessee     Mississippi Gateway Sitemap to all pages covering the state of Mississippi. Contributions and photography for the Mississippi guides from Alex Nitzman, Andy Field, Brent Ivy, Carter Buchanan and Justin Cozart. Mississippi City / Area Guides Laurel Jackson Hattiesburg Mississippi Gulf Coast Southeast Mississippi Mississippi Interstate Guides Interstate 10 Interstate 20 Interstate 55 Interstate 59 Interstate 69 Interstate 110 Interstate 220 Mississippi U.S. Highway Guides U.S. Highway 45 U.S. Highway 49 U.S. Highway 84 U.S. Highway 90 U.S. Highway 98 Mississippi State Route Guides Mississippi 26 Mississippi 57 Mississippi 63 Other Mississippi Roads Miscellaneous Statewide One and two digit state routes are primary and orientated with the lowest odd numbered route running north-south from west to the east and the even numbered routes assigned to east-west highways and counting upwards from north to south. There are some exceptions. Mississippi utilizes a route clustering system for the numbering of its one-hundred series of state routes, beginning with the 300 series at the northern end of the state to the 600 series in the Gulf Coast counties. 100 series numbers are reserved for former alignments of U.S. Highways and act as business loops or alternate alignments to the parent US Route. Mississippi 245 is an exception to this rule as it represents an old alignment of U.S. 45 Alternate. Unsigned routes are legislative in nature and range in the 700s, 800s and 900s, with a clustering system from north to south similar to the 300-600 series. Population Statistics State Population 2,967,297 Metropolitan Populations Jackson 539,057 Gulfport-Biloxi 248,820 Pascagoula 162,246 Hattiesburg 142,842 -- -- -- -- Top County Populations Hinds 245,285 Harrison 187,105 DeSoto 161,252 Rankin 141,617 Jackson 139,668 Madison 95,203 Top Incorporated Area Populations Jackson 173,514 Gulfport 67,793 Southaven 48,982 Hattiesburg 45,989 Biloxi 44,054 Meridian 41,148 Tupelo 34,546 Greenville 34,400 Olive Branch 33,484 Source: U.S. Census Bureau, 2010 Census Redistricting Data Summary File. Table of United States Metropolitan Statistical Areas Other Statistics Capital: Jackson Nickname: Magnolia State Total Interstate Mileage: 705.3 Highest Point: Woodall Mountain 806 feet Major League Sports Franchises None Page Updated February 20, 2013.