The count · Indonesia
Indonesia has 73 beaches.
We counted.
That’s 73named, mapped beaches — real OpenStreetMap geometry, deduplicated, nothing under 1,500 m² of actual sand. The true number is higher (unnamed coves don’t count themselves), so treat this as the verifiable floor. Combined mapped sand: roughly 1.8 km².
The widest of them
Jerman Beach — 58.5 m of sand, on average