The East Region in Singapore is one of the five regions and this region is the 2nd most densely populated among in Singapore. Interesting point to note is that East Region has the smallest land area. Key highlights it has Tampines as its regional centre, and good old Bedok has the most population in it. The Key Districts and its general locations are as tabulated above. More information can be found via the web link of the URA.
For the purpose of geographical representation, D14 & D15 has been included in East Region.