Company has faced boycotts and online protests since being bought by brewing giant Anheuser-Busch InBev.
Mayor says "we are losing our mill-town status, that is for sure."
But the cost of a single-family home in Redmond declined.
The social networking site operates two 330,000-square-foot data centers in Central Oregon, with space for a third.
Deschutes County gained 230 jobs in March, when economists projected 250.