|G1=地名
}}
{{Geobox|河流
| name = 多瑙河
| other_name = Donau
| other_name1 = Dunaj
| other_name2 = Dunărea
| other_name3 = Donava
| other_name4 = Duna
| other_name5 = Дунав
| other_name6 = Tuna
| other_name7 = Дунáй (Dunay)
| other_name8 = Dunav
| category =
<!-- *** Image *** -->
| image = Neue_Donau.jpg
| image_caption = 多瑙河流经[[维也纳]]
<!-- *** Name *** -->
| etymology =
| nickname =
| country = 德国
| country1 = 奥地利
| country2 = 斯洛伐克
| country3 = 匈牙利
| country4 = 克罗地亚
| country5 = 塞尔维亚
| country6 = 保加利亚
| country7 = 摩尔多瓦
| country8 = 乌克兰
| country9 = 罗马尼亚
| state =
| region =
| district =
| commune =
| municipality =
<!-- *** Family *** -->
| parent =
| tributary_left =
| tributary_right =
| tributary_right1 = [[File:Iron Gate Danube.jpg|thumb|多瑙河[[铁门]]在[[罗马尼亚]]及[[塞尔维亚]]的边界。]]
| city = 乌尔姆
| city1 = 因戈尔施塔特
| city2 = 雷根斯堡
| city3 = 林茨
| city4 = 维也纳
| city5 = 布拉迪斯拉发
| city6 = 焦尔
| city7 = 布达佩斯
| city8 = 武科瓦尔
| city9 = 诺威萨
| city10 = 贝尔格莱德
| city11 = 德罗贝塔-塞维林堡
| city12 = 鲁塞
| city13 = 布勒伊拉
| city14 = 加拉茨
| city15 = 图尔恰
| city16 = 伊兹梅尔
| landmark =
| source = [[布雷格河]]
| source_location = 德国[[黑森林]]地区[[富特旺根]]
| source_region =
| source_country =
| source_length = 49
| source_length_unit = km
| source_elevation = 1078
| source_lat_d = 48
| source_lat_m = 05
| source_lat_s = 44
| source_lat_NS = N
| source_long_d = 08
| source_long_m = 09
| source_long_s = 18
| source_long_EW = E
| source1 = [[布里加赫河]]
| source1_location = 德国黑森林地区[[黑林山区圣格奥尔根|圣格奥尔根]]
| source1_country =
| source1_length = 43
| source1_length_unit = km
| source1_elevation = 940
| source1_lat_d = 48
| source1_lat_m = 06
| source1_lat_s = 24
| source1_lat_NS = N
| source1_long_d = 08
| source1_long_m = 16
| source1_long_s = 51
| source1_long_EW = E
| source_confluence_location = [[多瑙艾辛根]]
| source_confluence_lat_d = 47
| source_confluence_lat_m = 57
| source_confluence_lat_s = 03
| source_confluence_lat_NS = N
| source_confluence_long_d = 08
| source_confluence_long_m = 31
| source_confluence_long_s = 13
| source_confluence_long_EW = E
| mouth = 多瑙河三角洲
| mouth_country = 罗马尼亚
| mouth_country1 = 保加利亚
| mouth_elevation =
| mouth_lat_d = 45| mouth_lat_m = 13| mouth_lat_s =3 | mouth_lat_NS =N
| mouth_long_d = 29| mouth_long_m = 45| mouth_long_s = 41| mouth_long_EW =E
| length = 2857
| width =
| depth = 54
| depth1 = 178
| depth1_type = 最大深度
| watershed = 817000
| discharge = 6500
| discharge_location = 多瑙河三角洲前
| discharge1_average = 580
| discharge1_note = <br />位于城镇前30公里
| discharge1_location = 帕绍
| discharge2_average = 1900
| discharge2_location = 维也纳
| discharge3_average = 2350
| discharge3_location = 布达佩斯
| discharge4_average = 4000
| discharge4_location = 贝尔格勒
| free =
<!-- *** Maps *** -->
| map = Danube basin.png
| map_caption = 多瑙河流域地图
| map_locator =
| commons =
| statistics =
| website =
| footnotes =
}}
'''多瑙河'''（德文：Donau）是[[欧洲]]第二大河，次于[[俄罗斯]]的[[伏尔加河]]，发源于德国[[黑森林]]地区，最后注入[[黑海]]，全长2857公里<ref name="hydatl"/>，流域面积81.7万平方千米<ref name="hydatl">Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit: Hydrologischer Atlas von Deutschland, Freiburg i. Br. 2003</ref>，平均流量为6500立方公尺/秒。