If you live in Loei then you will find Thai Immigration in Loei at the address listed below. See the opening hours, telephone numbers and a map to the immigration office in Loei. You can extend you Thai visa be it a marriage visa or tourist visa at the immigration office in Chiang Khan.
Note that this office is outside of the main city center and on the Thai Loas border at the river. Everyone knows where the Public Park is by the river so it is very easy to find. The Chiang Khan guest house and police station is across the road from the immigration office.
Thai Immigration in Loei
32 Moo 2 Amphoe Chiang Khan, Changwat Loei
Opening Hours: 8:30am-4:30pm Monday to Friday
Service Area: Loei Province