{{Geobox|River
 
| name                        =Ialomiţa River
| native_name                 =  
| other_name                  = 
| other_name1                 =

| image                       = 
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| country_type                = Countries
| state_type                  =
| region_type                 =
| district_type               = Counties
| city_type                   = Villages
| country                     = Romania
| country1                    =
| state                       = 
| state1                      = 
| region                      = 
| region1                     =
| district                    = Prahova County,Dâmboviţa County,Ilfov County,Ialomiţa County
| district1                   = 
| city                        = Pucheni, Moroeni,  Lunca,  Pietroşiţa,Fieni Pucioasa,Glodeni, DoiceştiAninoasa  Târgovişte,  Urziceni,Manasia,Alexeni,Ion Roată Sfăntu Gheorghe,Balaciu de Sus].Căzăneşti, Ciochina, Andrăşeşti,Perieţi,SloboziaCosâmbeşti,Bucu,Sudiţi,Ţăndărei
| city1                       = 

| length                      = 417
| watershed                   = 
| discharge_location          = 
| discharge                   = 
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| discharge1_location         = 
| discharge1                  = 

| source_name                 = 
| source_location             = Bucegi Mountains
| source_district             =
| source_region               =
| source_state                = 
| source_country              = 
| source_lat_d                = 
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| source_long_EW              = 
| source_elevation            = 
| source_length               = 

| mouth_name                  = Danube
| mouth_location              = Hârşova
| mouth_district              =
| mouth_region                =
| mouth_state                 = 
| mouth_country               = 
| mouth_lat_d                 = 
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| mouth_long_EW               =
| mouth_elevation             = 

| tributary_left              = Valea Şugărilor, Cocora, Lăptici, Scândurari, Blana,Nucet, Oboarele,Scropoasa, Orzea,Brânduşa, Gâlma, Ialomicioara,Ruşeţu,Leurda,Bizdidel,Slănic de Răzvad,Slănic de Gura Ocniţei,Pâscov,Crivăţ,Cricovul Dulce,Prahova,Sărata,Cotorca,Sărăţuica,Strachina
| tributary_left1             = 
| tributary_right             = Valea Doamnelor,Valea SucheniţeiHoroaba,Coteanu, Valea Văcăriei, Tătaru,Gâlgoiu,Mircea, Bolboci, Lucăcilă,Zănoaga, Valea Cabanierului, Brătei, Rătei,Raciu, Valea Doicii,Seciul cu Colţi, Voivodeni,Ţâţa,Ialomicioara,Vulcana,Glod,Ruda,Racoviţa,Snagov,Vlăsia,Comana
| tributary_right1            = 

| free                        = XI.1
| free_type                   = Official River Code

| map                         = 
| map_size                    =   
| map_caption                 =
}} 

The Ialomiţa River (Râul Ialomiţa in Romanian) is a river in the southern part of Romania. It comes up from the Bucegi Mountains of the Carpathians and flows into the Danube.

The upper part of the river is sometimes called Valea Obârşiei River or Obârşia Ialomiţei River'''.

Cities
Târgovişte
Slobozia

Tributaries
Prahova River

Lakes and dams
Lake Scropoasa

Tributaries of the Danube