Yes but its really expensive and they have almost a monopoly on the vast quantity of data. They are the linguistic data consortium. Yearly membership fees for companies is $24000, for non profits(e.g education) is $2400 per year. Plus it costs extra for the actual data.

http://www.ldc.upenn.edu/

Wikimedia Commons has a lot of samples, though they're not very strongly curated at the moment: http://commons.wikimedia.org/wiki/Category:Audio_files_by_la...

There are various university projects for specific languages or regions. This site has a number of samples of American English and American German dialects: http://csumc.wisc.edu/AmericanLanguages/index.htm

http://www.meertens.knaw.nl/soundbites/. Hundreds of hours of Dutch dialects, free for research, 'please cite us', contact them for other uses.

From the same institute: http://www.meertens.knaw.nl/projecten/sprekende_kaart/svg/