Brzóza Królewska is divided into the following parts: Podbór, Stępnie, Bednarze, Kmiecie, Zagrody, Łoiny, Flisy, Piaski, Podsośnina, Chiny.

However, over time, the population of Brzóza increased as a result of wolnizna (settlers did not have to pay rent for land in the beginning) granted to inhabitants by the starost from Leżajsk - Łukasz Opaliński.

Following the joint German-Soviet invasion of Poland, which started World War II in September 1939, the village was occupied by Germany.

It was included in the "Brzóźniański Obszar Chronionego Krajobrazu" (nature preserve) formed in 1992 (which contains an area of 118 square kilometres - of which 75% are woods).

It is the most precious site there, and is especially known for its peat bog reserve called Suchy Ług.

The beaver activity in this area has created many ponds and backwaters, making the landscape suitable for many rare birds and other forms of wildlife.