发源于[[长白山]]天池，自呼兰区[[利民街]]吕刚屯东入境，腰堡街、方台镇、二八镇、杨林乡东界少陵河口出境，境内段总长66千米，江段直线流程51千米，曲折系数1.29，最高洪峰水位118.35米，平均年径流量455.38亿立方米。

[[File:松花江啊.jpg|thumb|right|松花江啊 [http://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%9D%BE%E8%8A%B1%E6%B1%9F&step_word=&hs=0&pn=21&spn=0&di=5280&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2150204356%2C287163083&os=820172751%2C745144823&simid=3468664520%2C123479645&adpicid=0&lpn=0&ln=1827&fr=&fmq=1592982426025_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20171219%2Faf01023927e7472ebd1da2b9796d19a9.jpeg&fromurl=ippr_z2C%24qAzdH3FAzdH3F4p_z%26e3Bf5i7_z%26e3Bv54AzdH3Fda808d8lAzdH3Fgcdc0880nc_z%26e3Bfip4s&gsm=16&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 原图链接] [http://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%9D%BE%E8%8A%B1%E6%B1%9F&step_word=&hs=0&pn=21&spn=0&di=5280&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2150204356%2C287163083&os=820172751%2C745144823&simid=3468664520%2C123479645&adpicid=0&lpn=0&ln=1827&fr=&fmq=1592982426025_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20171219%2Faf01023927e7472ebd1da2b9796d19a9.jpeg&fromurl=ippr_z2C%24qAzdH3FAzdH3F4p_z%26e3Bf5i7_z%26e3Bv54AzdH3Fda808d8lAzdH3Fgcdc0880nc_z%26e3Bfip4s&gsm=16&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 图片来自于百度图片] ]]

发源于铁力市太平岭，为松花江最大支流之一。自呼兰区孟家乡张家围子入境，经孟家乡、兰河街道、呼兰街道、利民街道、腰堡街道出境，境内流长70千米，其中直线流程27千米，曲折系数2.59，最高洪峰水位119.01米，多年平均径流量41.29亿立方米。

[[File:呼兰河啊.jpg|thumb|right|呼兰河啊 [http://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%91%BC%E5%85%B0%E6%B2%B3&step_word=&hs=0&pn=9&spn=0&di=26620&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=1844623189%2C1960117900&os=2822592897%2C170591075&simid=3965798830%2C546671823&adpicid=0&lpn=0&ln=1861&fr=&fmq=1592982469039_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fn.sinaimg.cn%2Ffront%2F338%2Fw650h488%2F20181213%2FyfX--hqackaa9910272.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fh_z%26e3Bftgw_z%26e3Bv54_z%26e3BvgAzdH3Fw6ptvsj_cml80a9ana_8cn9abd1jaa8aa2hsh_z%26e3Bip4s&gsm=a&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 原图链接] [http://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%91%BC%E5%85%B0%E6%B2%B3&step_word=&hs=0&pn=9&spn=0&di=26620&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=1844623189%2C1960117900&os=2822592897%2C170591075&simid=3965798830%2C546671823&adpicid=0&lpn=0&ln=1861&fr=&fmq=1592982469039_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fn.sinaimg.cn%2Ffront%2F338%2Fw650h488%2F20181213%2FyfX--hqackaa9910272.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fh_z%26e3Bftgw_z%26e3Bv54_z%26e3BvgAzdH3Fw6ptvsj_cml80a9ana_8cn9abd1jaa8aa2hsh_z%26e3Bip4s&gsm=a&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 图片来自于百度图片] ]]

===泥河===