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Growing numbers of Missourians are dropping their landlines.

Estimates released Wednesday by the federal Centers for Disease Control and Prevention show 22 percent of Missouri adults rely solely on cellphones -- compared to about 24 percent nationally.

In St. Louis City and the adjacent St. Louis County, the rate of cellphone-only households was even higher at 26.9 percent. The rate for the rest of the state was 21.1 percent in the latest state-by-state figures covering the 12 months through June 2010.

Other states are seeing even fewer landline users. In Arkansas, 35 percent of adults are relying solely on cellphone usage. The report found 25 percent of Wisconsin adults are living in wireless-only households. That number is up 15 percent from a report two years ago.

The numbers show a big jump from the 12-month period ending in December 2007, when 10.1 percent of Missouri adults lived in wireless-only households.

(The Associated Press contributed to this story.)