Question: Where is the highest concentration of the Kinh population located?
About the article "Vietnam", section "Ethnicity".

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Kinh Môn is a rural district of Hải Dương Province in the Red River Delta region of Vietnam.
As of 2003 the district had a population of 164,956.
The district covers an area of 163 km².
The district capital lies at Kinh Môn (An Lưu). 
Kinh Do Corporation (, "KDC") (KINHDO:VN, KDC:VN) is a business group of Vietnam with an emphasis on food production, including baked goods, confections, snacks and soft drinks.
The corporate group also includes companies in the fields of financial services, real estate and a retail bakery chain.
Kinh Do Corporation manages a wide variety of brand names, distributes imported brand name snack and candy goods, and manufactures food for export from Vietnam.
Main offices of the company are located in Ho Chi Minh City.
Kinh Do is diversified into several fields of interest, listed along with significant subsidiary companies: Food, primarily confections and soft drinks, are manufactured and distributed by the following:  *Kinh Do Corporation *Binh Duong Kinh Do Corporation *North Kinh Do Food Joint Stock Company  *Ki Do Corporation - "ice cream and frozen yogurt" *Kinh Do Saigon *Vinabico Corporation - "confectionary" Finance and investment, Kinh Do Investment Corporation Real estate, Kinh Do Land Retail, Kinh Do Bakery - "Over 25 franchised bakery shops in Ho Chi Minh, Bien Hoa and Ha Noi"  
Kinh Dương Vương (Hán tự: 涇陽王; "King of Kinh Dương") is a legendary ancient Vietnamese figure who was the first Hùng Vương (King Hùng), mentioned in the 15th-century work Đại Việt sử ký toàn thư with having grouped all the vassal states within his territory into a unified nation, and as the founder of the Hồng Bàng Dynasty.
He is considered the first king of the Vietnamese people, and was the father of Lạc Long Quân.
Kinh Dương Vương's personal name was Lộc Tục (Hán tự: 祿續).
According to the 15th-century "Đại Việt sử ký toàn thư", he ruled over Xích Quỷ (later renamed Văn Lang) starting in 2879 BC.
Kinh Dương Vương's father was Đế Minh (帝明, "Emperor Ming" of Chinese and Vietnamese mythology), great-grandson of Thần Nông (Shennong).
His mother was Vụ Tiên Nu (婺僊女, Goddess Vu).
Kinh Dương Vương married Thần Long, who was the daughter of Động Đình Quân (Lord of Dongting Lake) and mother of Kinh Dương Vương's successor Lạc Long Quân.
Today Kinh Dương Vương features with other legendary figures such as Thánh Gióng, Âu Cơ, Sơn Tinh and Thủy Tinh, in elementary school texts.
A popular shrine, and presumed tomb of Kinh Dương Vương, is located in the village of An Lữ, Thuận Thành District, Bắc Ninh Province . 
There are three ethnic groups living in the district, Kinh, Cham people and BaNa.
The Cham are mainly concentrated mainly in Canh Hoà, Bana ethnic concentration in Canh Liên, Canh Thuận, Canh Hiệp, where they exceed 40% of the total population.
The Cham people settled in the mountainous area along with the indigenous tribes after the kingdom of Champa was dismantled in 1471.
As a result, the Cham have adopted many facets of Bana culture.  
According to the 2009 census, the dominant Viet or Kinh ethnic group constituted nearly 73.6 million people, or 85.8% of the population.
The Kinh population is concentrated mainly in the alluvial deltas and coastal plains of the country.
A largely homogeneous social and ethnic group, the Kinh possess significant political and economic influence over the country.
However, Vietnam is also home to 54 ethnic minority groups, including the Hmong, Dao, Tay, Thai, and Nùng.
Many ethnic minorities – such as the Muong, who are closely related to the Kinh – dwell in the highlands, which cover two-thirds of Vietnam's territory.
Before the Vietnam War, the population of the Central Highlands was almost exclusively Degar (including over 40 tribal groups); however, Ngô Đình Diệm's South Vietnamese government enacted a program of resettling Kinh in indigenous areas.
The Hoa (ethnic Chinese) and Khmer Krom people are mainly lowlanders.
As Sino-Vietnamese relations soured in 1978 and 1979, some 450,000 Hoa left Vietnam.