. Sainyabuli province is in the shape of a number 7 or an upside-down-L. It covers an area of . The province borders
Bokeo province and
Oudomxai province to the north,
Luang Prabang province and
Vientiane province to the east, and (from the south clockwise) the
Thai provinces
Loei,
Phitsanulok,
Uttaradit,
Nan and
Phayao. The province is mountainous with the
Luang Prabang Range running roughly in a north–south direction and forming a natural border with the
Thai highlands. The flattest and most tropical Laotian area is the
floodplain which stretches between the provinces of Sainyabuli and
Champasak. There are mountain peaks of greater than elevation. Other features include the Pak Kimin ridge near the Nam Heung stream. Sainyabuli province is home to approximately 75% of the nation's 560 domesticated elephants. They work in the logging industry, which causes a loss in wild and domestic elephant habitat. Sainyabuli province is home to the annual Elephant Festival, which has been running since 2007.
Protected areas The
Nam Phouy National Biodiversity Conservation Area (NBCA), a
protected area, is home to wild elephants. The NBCA is in the forested mountains of the
Luang Prabang Range close to the border with
Thailand and is part of the Luang Prabang montane rain forests
ecoregion. The reservoir of lower
Nam Phoun Dam is partly within the Nam Phouy NBCA. In view of the concentration of the largest number of Asian elephants in the province and Laos, the Lao Elephant Conservation Center has been established in Hongsa District. The 10,980 hectare Upper Lao Mekong
Important Bird Area (IBA) stretches across the provinces of Sainyabuli, Bokeo, and Oudomxai. It is at an elevation of . The topography is characterized by river channel, exposed beds, sandbars, gravel bars, islands, rock outcrops, bush land, and braided streams. Bird life includes
black-bellied tern (
Sterna acuticauda),
great cormorant (
Phalacrocorax carbo),
grey-headed lapwing (
Vanellus cinereus),
Jerdon's bushchat (
Saxicola jerdoni),
brown-throated martin (
Riparia paludicola),
river lapwing (
Vanellus duvaucelii),
small pratincole (
Glareola lactea), and
swan goose (
Anser cygnoides). The 18,230 hectare Mekong Channel upstream of Vientiane
Important Bird Area (IBA) is an approximately section of the Mekong Channel upstream of
Vientiane city. It overlaps two provinces: Sainyabuli and
Vientiane. Topographical characteristics are braided streams, bushland, gravel bars, open sandy islands, rock outcrops, and sand bars. Recorded avifauna include
wire-tailed swallow (
Hirundo smithii),
small pratincole (
Glareola lactea),
river lapwing (
Vanellus duvaucelii),
Jerdon's bush chat (
Saxicola jerdoni), and the
great thick-knee (
Esacus recurvirostris).
Administrative divisions The province is composed of the following 10 districts: ==History==