Research company InfoTrends carried out the survey of 1,045 professional photographers in the US. The figures showed improvements on previous years when Lightroom was almost twice as popular in 2007 and almost three times as popular in 2008.
The news was highlighted by Adobe's John Nack on his blog.
"As always, everyone at Adobe couldn't be happier about the warm reception pro photographers have given LR, and we're grateful to the amazing, thriving community that's grown up around the product," said Nack, Principal Product Manager, Adobe Photoshop.
"The team has just scratched the surface of Lightroom's potential, and the future looks great."
Adobe last week released Lightroom 2.5 and Camera Raw 5.5 updates, with both adding support for new digital camera models.
Those include Nikon's D300s and D3000, Olympus E-P1 and Panasonic DMC-GF1 and DMC-FZ35 cameras. Adobe adds in a blog post: "Note that in Europe and Japan this model is marketed as the DMC-FZ38. Unfortunately, due to a metadata difference between these cameras, files from the DMC-FZ38 will *not* be supported until the next Camera Raw and Lightroom updates."
According to release notes: "Camera Raw 5.5 and Lightroom 2.5 include a correction to the demosaic algorithms for Bayer sensor cameras with unequal green response. Olympus, Panasonic and Sony are among the more popular camera manufacturers affected by this change. But the demosaic correction provides only a subtle visual improvement to the processing of those raw files."