Lomena

{{Infobox river

| name = Lomena

| image = Lomena prie Elektrėnų-Jonavos kelio.JPG

| image_caption =

| source1_location = Vladikiškės surroundings

| mouth = Neris in Tartokas

| mouth_coordinates = {{coord|55|01|33|N|24|27|09|E|display=it|region:LT_type:river}}

| progression = {{RNeris}}

| subdivision_type1 = Country

| subdivision_name1 = Lithuania

| length_km = 32

| length_ref =

| source1_elevation =

| discharge1_avg = 1.18 m³/s

| basin_size_km2 = 186.9

| basin_size_ref =

| tributaries_left =Dumsė, Romatas, Živinta, Bistryčia, Verkstinė

| tributaries_right =Žasla, Rudija, Uterna, Taurė, Vertimas, Nota, Neprėkšta

}}

The Lomena is a river in Lithuania, constituting a left tributary of the Neris.[http://vanduo.gamta.lt/cms/index?rubricId=d55a80cd-f222-4c28-90d9-656080f83834 Neries mažųjų intakų (su Nerimi) pabaseinis] (Basin small tributaries of Neris (including Neris)) It starts in Vladikiškės, Kaišiadorys District Municipality and ends in Tartokas, Jonava District Municipality, Lithuania.{{cite web|url=http://www.upese.lt/index.php/l/lomena|title=Lomena upė. Baidarių nuoma. Stovyklavietės, poilsiavietės|publisher=upese.lt|accessdate=3 January 2021}}

The 32-km long Lomena passes through Stasiūnai, Gudiena, Kaišiadorys, Palomenė, Bagdoniškės, Lomeniai, Tartokas settlements. The river's lower course is protected by the Lomena Landscape Sanctuary.

The hydronym Lomena derives from Lithuanian word loma ('trough, depression, valley') although its older attested form, written in Polish as Łowmiana could suggest that it may derive from the word laumė ('a mythical being').