The Jian'ou dialect (Northern Min: / ; Chinese: ), also known as Kienow dialect, is a local dialect of Northern Min Chinese spoken in Jian'ou in northern Fujian province. It is regarded as the standard common language in Jian'ou.
According to The Eight Tones of Kien-chou (), a rime dictionary published in 1795, the Jian'ou dialect had 15 initials, 34 rimes and 7 tones in the 18th century, however there are only 6 tones in the modern dialect as the "light level" () tone has disappeared.
Jian'ou has four tones, which are reduced to two in checked syllables.
The entering tones in the Jian'ou dialect do not have any entering tone coda () such as , , and which makes it distinct from many other Chinese varieties.