Selonia
| Selonia Sēlija | |
|---|---|
| 
 | |
| Location of Selonia in Latvia. | |
| Country | Latvia, Lithuania | 
| Largest city | Jēkabpils | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
Selonia (Latvian: Sēlija; Lithuanian: Sėla), also known as Augšzeme (the "Highland"), is one of the Historical Latvian Lands encompassing the eastern part of the historical region of Semigallia (Latvian: Zemgale) as well as a portion of northeastern Lithuania. Its main city and cultural center is Jēkabpils. The Selonian language has become extinct, though some of the inhabitants still speak a Selonian subdialect.