From the main German Genealogy Records page, you can browse by state (mistakenly labeled as Counties in the drop-down menu) and by time period. Or try searching for a name in the fields on the left side of the page.
The records include about 27 million names, according to the 24-7 Family History Circle blog, with most records from the late 1800s to mid-1900s.
World Deluxe Membership is required to access the digitized directories. Click here to search them.