Rosa Sibella Macarthur Onslow | |
|---|---|
 | |
| Born | Rosa Sibella 4 June 1871 |
| Died | 16 July 1943 |
| Nationality | Australian |
| Education | home schooled |
| Known for | managing the Camden Park Estate |
Rosa Sibella Walton Onslow became Rosa Macarthur-Onslow CBE (4 June 1871 – 16 July 1943) was an Australian charity and church worker. She inherited and managed Camden Park in New South Wales. Guests at the house included the Duke and Duchess of York.