Ruciane-Nida

{{Infobox settlement

| name = Ruciane-Nida

| image_flag =

| image_shield = POL Ruciane-Nida COA.svg

| image_skyline = Ruciane Nida - przystań - panoramio.jpg

| image_caption = Marina in Ruciane-Nida

| pushpin_map = Poland

| subdivision_type = Country

| subdivision_name = {{POL}}

| subdivision_type1 = Voivodeship

| subdivision_name1 = Warmian-Masurian

| subdivision_type2 = County

| subdivision_name2 = Pisz

| subdivision_type3 = Gmina

| subdivision_name3 = Ruciane-Nida

| established_title = Town rights

| established_date = 1966

| area_total_km2 = 17.07

| population_as_of = 2006

| population_total = 4894

| population_density_km2 = auto

| coordinates = {{coord|53|38|33|N|21|32|57|E|region:PL|display=title,inline}}

| timezone = CET

| utc_offset = +1

| timezone_DST = CEST

| utc_offset_DST = +2

| elevation_m =

| postal_code_type = Postal code

| postal_code = 12-220 - 12-221

| website = http://www.ruciane-nida.pl

}}

Ruciane-Nida {{IPAc-pl|r|u|'|ć|a|n|e|-|'|ń|i|d|a}} is a town in Pisz County, Warmian-Masurian Voivodeship, Poland. The town was formed in 1966 by the merger of three smaller settlements: Ruciane ({{langx|de|Rudczanny}}, renamed Niedersee in 1938{{cite book|title=Ortsnamenverzeichnis der Ortschaften jenseits von Oder u. Neiße |author=M. Kaemmerer|year=2004| ISBN= 3-7921-0368-0 |language=German}}), Nida (German: Nieden) and Wola Ratajowa. It is located within the historic region of Masuria.

The town of Ruciane-Nida is a well-known tourist centre within the Masurian Lake District, with a popular railway line running through it: a D29-219 line – Olsztyn – Szczytno – Świętajno – Pisz – Ełk. In the summer, it becomes the furthermost Southern station of the Masurian Recreational Navigation system.

As of 2004, the town had a population of 4,934.