Ginsburg's wealth is all over the place. One site has her at $900K, another at $20 million. She is listed on those under 'richest actors'. Open Secrets [2011] says this:

" Justice Ruth Bader Ginsburg – $28 million – The second female justice in the Court’s 222-year history, Ginsburg is also the current court’s wealthiest by a long shot. And she’s only getting wealthier. In 2008, Ginsburg’s net worth was between $7.2 million and $29.5 million, an average of $18.3 million. By 2009, her wealth had increased by about 50 percent, putting her worth somewhere between $10.7 million and $45.4 million that year. Among her assets she counts a hefty TIAA-CREF retirement account worth at least $6 million."

opensecrets.org/news/2011/09/ruth-bader-ginsburg-steven-breyer/