We haven't confirmed this with Lionsgate yet, but the Catching Fire page on Moviefone's website lists the US DVD release of the movie as March 7, 2014. This would make perfect sense since there is a preview of Divergent on the DVD, which hits theaters on March 21, 2014, giving fans a couple of weeks to check out the preview prior to the movie's premiere.
The official Hunger Games UK Twitter page tweeted a link from Zaavi, where you can pre-order a limited edition Catching Fire DVD Steelbook Edition, and Zaavi had a release date of April 28, 2014 listed for the DVD in the UK. If this seems a little late to you, remember The Hunger Games was also released a few weeks later in the UK than the US last year.
We'll keep you posted when the release dates are confirmed!
Thanks to Mockingjay.net and THGAustralia.