Census-Online.com - census transcriptions for York Co.
Interment.net - cemeteries of  York Co.
The Tombstone Transcription Project - cemeteries for York Co; PA
US GenWeb Archives for York County cemeteries, newspapers, wills, military rosters etc recorded online here
York County GenWeb Projectcollection of online resources for genealogy researchers
York County Message Board read and post messages with other genealogy researchers of this county
York County, PA Genealogy Forum read and post messages about your ancestors for this county
York County 1840 Census
York County 1850 Census

Additional Resources

Pennsylvania Public Records Search find living & deceased family members/relatives including address, phone number, age..
Pennsylvania Birth Records
Pennsylvania Marriage Records
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Pennsylvania Death Records