The lie of the land is typical for the Lubuskie Lake District. The land is undulating, with numerous hills and depressions. The areas around Sulęcin constitute the highest central part of the Lubuskie Lake District macro-region. The heights of the particular parts of the area range from 120 to 227 m above sea level. The highest hills can be found in the southern and eastern part of the Municipality: Trzemeska Góra – 201 m above sea level, Góra Bukowiec – 227 m above sea level.
The two most important rivers flowing through the Municipality are the Postomia and Jeziorna Rivers. The river intervales cross the upland perpendicularly to the axis, forming deep incisions in the moraine material.
The land use structure in the Sulęcin Municipality: agricultural land - 27.1 %, of which arable land - 88.7%, meadows - 6.5%, pastures - 5.3%, orchards - 0.1%; forests - 54.3%; other lands - 18.6%. Permanent grassland constitutes 12 % of the agricultural land. It can usually be found along rivers and it covers nearly the entire valley part of the Municipality. More than a half (55%) of the Municipality territory is covered by forests, in which pine forests dominate. In the eastern part of the Municipality there are mixed and beech forests, while along the rivers - alder forests.
Some of the forest lands are under protection as water- and soil protecting areas. About 25% of the Municipality territory is covered by a military training ground located in the southern part of the Municipality. This area is largely arboreous; most of the lakes in this land can be found there (13).