More than 700 people have written to her website, backing a campaign to keep her in the soap.
Fans reckon it's important to keep a mix of young and old characters in the show. Rev Rosie's been popular since she joined Neighbours last year, and caused a love triangle between old pals Lou and Harold.
Coincidentally, fans launched a similar campaign to "Bring back Lou" when actor Tom Oliver was axed from the show a few years ago.
Australian Barry Campbell, who runs Maggie's internet fan site, told CBBC Newsround Online:
"The response from fans has been phenomenal. The majority want Maggie to stay," he said.
"I'm quite sure that there has never been such a massive campaign to save any character in a soap!"