No, unless you count the old guys with canes who are in charge of the candle stand near the front door as security :laugh: But, seriously, I've never been to a big or small church that had security - although I've never been to a mega-church for Sunday worship.
However, my son is 13 and this has been Bar Mitzvah year... and at each of the synagogues there was security. I understand that there's a need, but it's a sad statement too.