These are the wealthiest ZIP codes in Greater...

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Howard County remains the richest county in Greater Baltimore. The five wealthiest ZIP codes in the Baltimore area are all in Howard County — as well as eight of the top 10. Highland — ZIP code 20777 — was ranked No. 1 on our list of the wealthiest area ZIP codes, based on data provided by mapping and database manager Esri. Residents within the 20777 ZIP code have a median household income of $167,495 and an average of $148,247 in disposable income. Howard County also dominated our ranking…