The place is about 160 km as the crow flies east of the Kurgan Oblast Administrative Center in the West Siberian lowlands . It is located on several smaller, drainless lakes, a good 5 km south of the larger, salty Akkul lake and 3 km north of Kabanje lake.
Tschastooserje is the administrative center of the Tschastoosjorski Rajons and the seat of the rural community (selskoje posselenije) Tschastoosjorski selsowet, which also includes the villages of Denissowo (3 km north) and Kazanzewo (10 km north).
The village was founded around the turn of the 18th century. Its name is derived from the Russian tschastyje osjora , roughly "frequent lakes" in relation to its location. In November 1923 Tschastooserje became the administrative seat of a Rajon named after him. In 1963 the Rajon was dissolved and its territory was added to the Petuchowski rajon, which is based in the small town of Petuchowo , a good 50 km south , but was rebuilt in 1972.
Note: census data
To the east of the village runs the regional road 37K-0001, which connects Makushino with the border to Tyumen Oblast that runs a good 20 km northeast of Chastooserje and continues there via Berdyushje to Ishim . As a cross connection between the federal highways R254 Irtysh Chelyabinsk - Novosibirsk and R402 Tyumen - Omsk, it is part of the bypassing of the Kazakh territory on the R254 and part of the European route 30 . Chastooserje is connected to Petuchowo via 37K-0009.
- Itogi Vserossijskoj perepisi naselenija 2010 goda. Tom 1. Čislennostʹ i razmeščenie naselenija (Results of the All-Russian Census 2010. Volume 1. Number and distribution of the population). Tables 5 , pp. 12-209; 11 , pp. 312–979 (download from the website of the Federal Service for State Statistics of the Russian Federation)