In Atoka County, US-69/75 bypass Caney and Tushka to the west before coming to the SH-3/7 junction in the county seat of Atoka, Oklahoma; at this junction, SH-3 joins with the U.S. routes while SH-7 has its eastern terminus. North of this interchange, US-75 and SH-3 split off, leaving US-69 without any concurrent routes for the first time since crossing the Red River. Seven miles (11.3 km) northwest of Atoka, US-69 begins another concurrency, this time with SH-43, near Stringtown. The two routes run along the east shore of Atoka Lake before SH-43 splits off to the west. US-69 then heads through unincorporated Chockie, and then serves as the eastern terminus of SH-131 just south of the Pittsburg County line.