Osterseen

{{Short description|Lakes in Germany}} {{Expand German|topic=geo|Osterseen|date=April 2026}} {{Infobox body of water | name = Osterseen | image = Aerial image of Osterseen (view from the south, 2026).jpg | caption = | image_bathymetry = | caption_bathymetry = | location = Bavaria | coords = {{coord|47.7903|11.3042|region:DE-BY_type:waterbody_source:dewiki|display=inline,title}} | type = |pushpin_map=Bavaria | inflow = | outflow = | catchment = | basin_countries = Germany | length = {{convert|5.2|km|abbr=on}} | width = {{convert|1.0|km|abbr=on}} | area = {{convert|223.55|ha|abbr=on}} | depth = {{convert|9.38|m|abbr=on}} | max-depth = {{convert|29.7|m|abbr=on}} | volume = {{convert|20975100|m3|abbr=on}} | residence_time = | shore = | elevation = {{convert|588|m|abbr=on}} | frozen = | islands = | cities = Unterlauterbach, Staltach (Iffeldorf) | reference = | sections = Großer Ostersee, Waschsee, Schiffhüttensee, Sengsee, Wolfelsee, Fohnsee, Helgraben, Brückensee, Herrensee, Fischkaltersee, Bräuhaussee, Forchsee, Eishausse, Östlicher Breitenauer See, Westlicher Breitenauer See, Ameisensee, Stechsee, Lintensee, Gröbensee, Kleiner Gartensee, Großer Gartensee, Ursee, Lustsee }}

'''Osterseen''' is a group of lakes in Bavaria, Germany, about 50 km (31 miles) south-south-west of Munich. At an elevation of 588 m (1,929 feet), its surface area is 223.55 ha (552.4 acres).

== Islands == sorted by water body:

===Großer Ostersee=== (islands starting from North to South) * Holzau (6,1 hectares) * Marieninsel (2,3 hectares, Length 440 m in north–south orientation, width up to 80 metres)<ref>[https://geoportal.bayern.de/bayernatlas/?topic=ba&bgLayer=historisch&lang=de&catalogNodes=11,122&X=5294875.42&Y=4447816.49&zoom=13 Historische Flurkarte] ({{ill|Bayerische Uraufnahme|de}}) im {{ill|BayernAtlas|de}}</ref> * Steigerinsel (0,45 ha), formerly ''Putzen Eila'' * Roseninsel (0,013 ha oder 130 m<sup>2</sup>, actually two very small islands) * Schwaigerinsel (0,75 ha, 40 m distance from western bank)

===Frechensee=== * unnamed island, c. 20 m distance from northern bank (0,09 ha) * unnamed island, c. 25 m from western bank (0,13 ha)

==Map== center|550px|Map thumb|right|Grosser Ostersee

==See also== *List of lakes in Bavaria

==References== {{Reflist}}

== External links == {{commons category}} *{{Lakes Germany 2004|Großer Ostersee|Bavaria|page=30}}

Category:Lakes of Bavaria Category:Weilheim-Schongau