Ukrainian Ye or Round Ye (Є є; italics: Є є) is a character of the Cyrillic script. It is a separate letter in the Ukrainian alphabet, the Pannonian Rusyn alphabet, and both the Carpathian Rusyn alphabets; in all of these, it comes directly after Е. In modern Church Slavonic, it is considered a variant form of Ye (Е е) (there, the selection of Є and Е is driven by orthography rules). Until the mid-19th century, Є/є was also used in Romanian and Serbian. Other modern Slavonic languages may use Є/є shapes instead of Е/е for decorative purposes. Then, the letter is usually referred to by the older name Yest (which also refers to the conventional Ye). If the two need to be distinguished, the descriptive name Broad E is sometimes used (in contrast with "Narrow E"). It can also be found in the writing of the Khanty language.

In Ukrainian, Є/є commonly represents the sound /je/ or /jɛ/ like the pronunciation of ⟨ye⟩ in "yes". (See usage for more detail.)

Ukrainian Ye is romanized as ⟨je⟩, ⟨ê⟩, or even ⟨e⟩. See scientific transliteration of Cyrillic.

Ukrainian Ye also looks like a backwards version of Э judging by their appearance. (Є/Э)

Letter Є/є was derived from one of the variant forms of Cyrillic Ye (Е е), known as "broad E" or "anchor E". Є-shaped letters can be found in late uncial (ustav) and semi-uncial (poluustav) Cyrillic manuscripts, especially ones of Ukrainian origin. Typically it corresponds to the letter Iotated E (Ѥ ѥ) of older monuments. Certain old primers and grammar books of Church Slavonic language had listed Є/є as a letter distinct from Е/е and placed it near the end of the alphabet (the exact alphabet position varies). Among modern-style Cyrillic scripts (known as "civil script" or "Petrine script"), Є/є was first used in Serbian books (end of the 18th century and first half of the 19th century); sometimes, Serbian printers might be using Э/э instead of Є/є due to font availability. For the modern Ukrainian language, Є/є has been used since 1837 (orthography of almanach "Русалка Днѣстровая" (Rusalka Dnistrovaya)). In Cyrillic numerals, Є is always preferred to E to represent 5.

In Ukrainian and Rusyn, Є/є represents the sound combination /je/ or the vowel sound /e/ after a palatalized consonant.

It is the 8th letter of Ukrainian alphabet (in 1935-1992 it was the 7th, as Ґ was banned).

In Khanty, the letter represents the sound /je/.