Olympia had the weakest vacancy rate at 8.18 percent in the third quarter, while it was stronger in Tumwater at 6.39 percent, the data show.
"Thurston continues to languish," Apartment Insights principal Tom Cain said in a news release.
Rents showed a slight improvement in the county as a result of the weaker vacancy rate, falling $1 to $836 per month, or 99 cents per square foot.

