Mundaka (Spanish: Mundaca) is a town and municipality located in the province of Biscay, in the autonomous community of Basque Country, in northern Spain.

Mundaka is internationally renowned for the surfing community that takes advantage of its coast and unique oceanic conditions.

The first written mention of Mundaka dates from 1070, when it was referred to as "Mondaka" in the writing of Ego Mome Nunnuç placuit in animis meis mitto in Sancti Johannis de Orioli de Aragone uno monasterio in Bickaga (Vizcaga) in locum quae dicitur Mondaka (Mondacha).

Mundaka lies precisely at the mouth of the estuary of the Oka river, which flows between Santa Catalina and Laida.

[5] Others have related the town name to a stock of Basque phonemes with the endings "-aka", "-eka", "-ika", which are especially abundant in Biscay and which can be linked with the Celto-Italic suffix "-aka".

Another possible theory for the origin for the name "Mundaca", is similar to "Munitibar" and "Munditibar", which contains the stem "Munio or Mundio", as in "Muniozguren" and "Munitiz", which refers to a hill or hillock.

Mundaca shares its western border with the town of Bermeo, to the South with Pedernales, and to the East and North with the Cantabrian Sea.

[6] The area has been populated since the Lower Paleolithic period, as attested to by the caves of Santimamiñe on the other side of the estuary and deposits found in Portuondo.

These were the only ones who could adopt ordinances, usages and customs that were to govern themselves, due to their nature of autonomous community and without having to submit to the terms for the granting of the Charter puebla, as happened to the villas.

Thus, all mundaqueses, including the widows who were head of the family and could vote, gathered in Assembly or "stop cross" to achieve their agreements, chairing the "' faithful Alderman"'.

Between the faculties of the faithful was the representation of the autonomous community in the County Councils of Biscay until they ceased to meet due to the abolition of immunity in 1876.

Bildu, a pro-Basque independence coalition, won 3 seats, while PSE-EE and popular failed to achieve representation due to the low number of votes obtained.

The estuary at Mundaka has created a perfect sandbar which forms hollow waves that can be watched from the town's harbor wall.