A: High Demand
- Ang Mo Kio Central
- Bedok Central
- Bras Basah
- Bukit Batok Central
- Bukit Merah Central
- Bukit Timah
- Changi Airport
- Choa Chu Kang Central
- Clementi Central
- Crawford
- Covent Garden (Tiong Bahru Post Office)
- Harbourfront Centre
B: Low Demand
Large P.O. Boxes now available at locations in blue!
- Airmail Transit Centre
- Alexandra (Tiong Bahru Post Office)
- Balestier Estate (Towner Post Office)
- Bukit Panjang
- Farrer Road (Bukit Timah Post Office)
- Geylang
- Ghim Moh Estate
- Jalan Kayu (Lim Ah Pin Rd Post Office)
- Kent Ridge (Pasir Panjang Post Office)
- Macpherson Road