River
Iller
147 km from source to mouth · Germany.
GermanyFlows into Danube
In numbers
Length
147km
Average flow
90m³/s
Basin
2,152km²
Drop
314m
from 785 m to 471 m
Country
1
The journey
From source to mouth
147 km of river and 49 stops on the way: 32 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmIller river sourceat 785 m
- 3 kmOberstdorf9,279 people
- 7 kmFischen im Allgäu3,120 people
- 15 kmSonthofen21,285 people
- 19 kmBurgberg3,124 people
- 20 kmBlaichach5,625 people
- 23 kmImmenstadt im Allgäu14,431 people
- 24 kmKonstanzer Achtributary
- 36 kmNiedersonthofen Lake1.1 km²
- 37 kmSt. Michael
- 41 kmSulzberg4,587 people
- 42 kmWaltenhofen9,045 people
- 44 kmDurach6,675 people
- 47 kmObere Illerbrücken
- 47 kmKing Louis Bridge
- 48 kmBeginenhaus Kempten
- 48 kmSt.-Mang-Brücke
- 48 kmKempten (Allgäu)61,399 people
- 48 kmIllersteg
- 49 kmKempten67,916 people
- 50 kmRottachtributary
- 51 kmRiederaubrücke
- 57 kmLauben3,274 people
- 58 kmDietmannsried8,044 people
- 64 kmAltusried9,950 people
- 65 kmIllerstaustufe 4
- 69 kmIllerstaustufe 5
- 70 kmRohrachtributary
- 74 kmIllerstaustufe 6
- 79 kmIllerkraftwerk Maria Steinbach
- 79 kmKronburg1,736 people
- 80 kmLautrach1,198 people
- 86 kmAitrach2,580 people
- 95 kmMemmingen44,378 people
- 95 kmBuxheim3,060 people
- 99 kmBuxachtributary
- 99 kmHeimertingen1,758 people
- 105 kmFellheim1,197 people
- 105 kmKirchdorf3,679 people
- 110 kmKellmünz1,391 people
- 115 kmMemminger Achtributary
- 116 kmAltenstadt4,790 people
- 122 kmDietenheim6,630 people
- 123 kmIllertissen16,522 people
- 128 kmBellenberg4,607 people
- 130 kmIllerrieden3,320 people
- 131 kmVöhringen13,207 people
- 137 kmSenden22,275 people
- 146 kmUlm130,288 people
- 146 kmNeu-Ulm51,389 people
- 147 kmDanubeat 471 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
Right tributary of Danube in Baden-Württemberg, Germany
At the mouth it carries 90 m³/s on average: an Olympic pool every 28 seconds. It drops from 785 m to 471 m, 2.1 m per kilometre on average. Its basin covers 2,152 km², about the size of KM. 385,000 people live in it. Highest water: March; lowest: from December to February. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- UlmLargest city on its banks · 130,288 people
- Memmingen Allgau Airport (FMM)Nearest airport with scheduled flights, 49 km from the cityCar hire at FMM airport (Memmingen)Discover Cars · Affiliate link↗
- On the water14 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe13 put-ins and rapids mapped (OpenStreetMap)
- From June to SeptemberThe best months to visit
Iller, month by month
Highest water: March
Lowest water: from December to February. Best months to visit: from June to September.
From about 31 m³/s in the lowest month to 74 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
Iller: the basin in numbers
2,243 km² of land send their water to this river. This is what lives on it.
- 385,000people live in the basin
- 172/km²people per km²
- 890maverage altitude of the basin
- 1,021mmof rain a year (basin average)
- 6.3°Caverage air temperature
- 30%protected areas
- 0.5%covered by lakes
- 0.0km³held in reservoirs
What covers the basin
- 49% Forest
- 10% Cropland
- 29% Pasture
- 9% Towns and cities
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Iller: what you find on the way
- 109Weirsehemaliges Wehr, Rubistufe (Kanonenrohr), Rückhaltesperre Steigbach and 106 more
- 1LocksFischtreppe Herrenstetten
- 4Waterfalls
- 6Rapids
- 7Canoe put-ins
- 4Boat ramps
- 9Ferry piersIllerfähre Wagsberg, Ulm (Saumarkt), Neu-Ulm (Edwin-Scharff-Haus) and 6 more
- 1MarinasHafenanlage Fischereiverein
- 6River beachesSandbank, Illerstrand, Kiesbank Badeplatz Wiblingen and 3 more
From OpenStreetMap, within 1.4 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Iller in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
1lake on its wayLakeyas
74mountains at the sourcePeakyas
Lakes and reservoirs (1)
Lakes it flows through, by Lakeyas
- Niedersonthofen Lakekm 341.1km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (74)
Within 15 km of the source, by Peakyas
- Krottenkopf14 km away · prominence 997 m2,656m
- Hochfrottspitze14 km away · prominence 203 m2,649m
- Bockkarkopf15 km away · prominence 106 m2,609m
- Trettachspitze14 km away · prominence 145 m2,595m
- Marchspitze14 km away · prominence 214 m2,609m
- Hochvogel13 km away · prominence 572 m2,592m
- Öfnerspitze13 km away · prominence 137 m2,576m
- Rauheck12 km away · prominence 184 m2,385m
66 more on PeakyasOpen Peakyas ↗
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Iller in pictures
Tributaries
Where it flows, and what flows into it
It flows into
Danube
Romania2,850 km5,400 m³/sTributaries (17)
Also: Breitach, Aitrach, Buxach, Memminger Ach, Rottach, Rohrach, Trettach, Ostrach, Stillach, Tannschorrenbach, Weiler Ach, Rottach, Gunzesrieder Ach, Konstanzer Ach, Waltenhofener Bach, Wangener Bach, Iselbach
Serbia
Croatia
Moldova
AustriaNearby
Rivers nearby
Switzerland
FranceWhere these numbers come from
| Name, length, places | Wikidata (Q159467) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Lakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
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Every waterfall: height, flow month by month and when it roars.Coming soonVisit 
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Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
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Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit