Does Yingkou dialect belong to Northeast dialect?

Don't belong. Yingkou dialect belongs to Jiaoliao Mandarin-Gaihuan dialect. It is a special mixed accent with Jiaoliao dialect as the main dialect, Tianjin dialect as the supplement, and northeast dialect vocabulary.

Yingkou is a city that comes by boat, so dialects are also imported. Yingkou dialect is also the evolution of modern Yingkou history. Yingkou City is a retreat to the sea, and the land has high salt content, so it is not suitable for farming, so there are no permanent residents first. Yingkou dialect only uses the basic pronunciation of Jiaoliao Mandarin, which is not completely consistent with the Lian Deng accent of Jiaoliao Mandarin.

Historical evolution:

Judging from the records of Yingkou's modern history, Yingkou dialect is obviously a modern product. In modern times, a large number of immigrants live together, and dialects are difficult to change. Both Shandong immigrants and Tianjin Hebei immigrants have retained their native dialects. After a long period of integration, the two immigrant groups formed today's unique Yingkou dialect. The dialect in Yingkou area is rather confusing.

The southeast towns of Gai County (now gaizhou city) and Yingkou County (now dashiqiao city) are the cover rings of Jiaoliao Mandarin. Northeastern mandarin is a township in the west and north of Yingkou County (now dashiqiao city). Most of Yingkou city is a small piece of Yingkou, which has been changed into a piece of Jiaoliao Mandarin.

Many residents in Xidamiao Community and Hebei Street in the western city of Yingkou still retain the Tianjin Xia Hai accent (descendants of Xianshuigu and Jinghai immigrants), and residents in coastal streets, Tiegang Street in Li Dongjing Station District, Tiegang Village in Laobian District and Shi Lian all use Jiaoliao Mandarin.