Androlib posted a chart showing that there are over 50,000 applications in the Android Market. However, Google has not commented the official number of apps in response to AndroLib's claim, but according to BoyGeniusReport, Google has previously said they were "aware of 38,000 applications." With the huge growth seen in March, is 50,000 apps really too hard to believe?
It is important to note that many of the apps in the Android Market are not worth downloading due to the same app being reposted several times when a new update comes out. That and the number of nearly useless app inflates this number significantly. AndroidCentral added a relevant thought, saying:
That said, 50,000 items in the Market is a real possibility, but let's be honest here: How many of those "applications" are (a) actual "applications" and (b) something you'd actually want to download?
As for me, I will wait for an official announcement by Google saying they show over 50,000 apps in the Android Market. Especially since finding the exact source for their claim has eluded me (except for that picture.)
Image from Phandroid