Welcome to the fantastic area of Old Westbury! As of the latest US census, around 4,502 call this area home and around 91% are homeowners. With an average age of 42, the residents of Old Westbury are well established, with many growing families of all ages. However, during weekends and holidays, you can see a lot more activity and excitement. Over the past 30 days roughly 2 homes have been sold with an average sold price of $1,992,500. That is a decrease of $2,230,000 from the previous period.