Jackson County - the Medford area - says it is planning to quit the Association of Oregon Counties, which for many, many years has had as members all 36 in the state. (If recollection serves, its counterparts in Washington and Idaho have all counties as members.) Its annual dues are about $31,000.
Why is apt to be a complicated story and it will probably sound different in the telling by different people. The view from Medford turns up in an intriguing article in today's Mail Tribune, which suggests that a large part of it has to do with differences over legislative proposals.
More coming on this, probably.