There are several areas of OC where foxes can be seen, mostly in the dunes or in less developed areas. They are a relatively small population and have not been a problem for people as they generally keep to themselves. I usually see a foxes in the dunes or along undeveloped areas along the bay. I regularly see one at Sunset Island (usually in the evening) and also saw one in the dunes at 67th Street a few time this summer early in the morning.
The foxes' appearance is an interesting example of how nature works. The dunes were completed in late 1991. Not too long after that rabbits could be seen living in the dunes. Over time their population exploded (after all, they are rabbits), and there was briefly a concern that their burrows could compromise the integrity of the dunes. However, nature addressed the issue, and foxes soon appeared. The foxes keep the rabbit population in check, and the smaller size of the rabbit population naturally limits the size of the fox population. However, to keep everything in balance, as is true for all wild animals, it is important that people don't feed the foxes or the rabbits.
I have followed news in OC for many years, and have never heard of an incident where a fox attacked a person or of any issue with rabies in the fox population. The only issue I recall was a few years ago when some people were feeding a fox and had sort of adopted it and others objected. I believe animal control eventually relocated that fox.
Thanks for the interesting question!
Answered: September 12, 2011