The economists' assessment stands in stark contrast with Mr. Obama's popularity with the public, with a recent Wall Street Journal/NBC poll giving him a 60% approval rating.
A majority of the 49 economists polled said they were dissatisfied with the administration's economic policies.
On average, they gave the president a grade of 59 out of 100, and although there was a broad range of marks, 42% of respondents rated Mr. Obama below 60.
Mr. Geithner received an average grade of 51.
Federal Reserve Chairman Ben Bernanke scored better, with an average 71.