Probably. Their RateBeer data indicates only 12 breweries, which seems like it's off by 2-4 fold? There must be at least 30 places within city limits, no? Maybe another 20 or so within 5-10 miles?

They also don't note the brands with East Coast production there like, say, Sierra Nevada and Oscar Blues, which would be hard to argue don't count as breweries.

Anyway, Santa Rosa is so small, it could really be the winner. But per capita, it would be hard to imagine anywhere else besides Asheville would be the spot.

At one point it had the most microbrews per capital.