| Type: | town |
| Round Mountain | |
| State: | nsw |
| Pop: | 143 |
| Coordinates: | -28.3592°N 153.5339°W |
| Postcode: | 2484 |
| Timezone: | AEST |
| Utc: | +10 |
| Timezone-Dst: | AEDT |
| Utc-Dst: | +11 |
| Lga: | Tweed Shire |
| Stategov: | Tweed |
| Fedgov: | Richmond |
Round Mountain is a town located in north-eastern New South Wales, Australia, in the Tweed Shire.
In the, Round Mountain recorded a population of 143 (51.4% male).
The median age was 47, 9 years above the national median of 38.
81.8% of people living in Round Mountain were born in Australia. The other top responses for country of birth were England 7.0%, New Zealand 2.1% and Scotland 2.1%.
94.3% of people spoke only English at home. There were no other responses for language spoken at home.