St Tammany Parish is located on the northshore of lake pontchartrain, north of New Orleans and Jefferson Parish.  The Eastern part of the parish consist's of the city of Slidell and Pearl River.  The Western side consist's of Mandeville, Covington and Madisonville.  The town of Lacombe is in the middle.  I really don't know if they are considered west or east.

The following economic number were released by the U.S. Economic Bureau.

East St. Tammany zip codes

Population 117,615

Average Family Income 75,660

Median Home Value 144,933

10% of people living below the poverty level

West St. Tammany zip codes

Population 115,550

Household Income 103,486

Median Home Value 223,428

Poverty level 6%