Vlachovo (Hungarian: Oláhpatak, German: Lambsdorf, Lampertsdorf) is a village and municipality in the Rožňava District in the Košice Region of middle-eastern Slovakia.

In historical records the village was first mentioned in 1427 as Alahpathaka, but until the end of the 14th century it was also referred to as Lampertfalva. In 1597 it was referred to as Oláhpataka alias Lampertsdorf. Since then it was called Oláhpatak, and rarely Oláh Pataka. Slovaks referred to the commune also as Vlachov or Wlachowo. When it became part of Czechoslovakia, its name became Vlachovo. Before the establishment of independent Czechoslovakia in 1918, Vlachovo was part of Gömör and Kishont County within the Kingdom of Hungary. From 1939 to 1945, it was part of the Slovak Republic.

The village lies at an altitude of 397 metres and covers an area of 37.332 km.

It has a population of 839 people (2015).

The village has a public library, a gymnasium and a swimming pool.

The village is also home to a historical blast furnace and smelter building, a branch exhibit of the Slovak Technical Museum in Košice.

• Gyula Andrássy, (1823 in Oláhpatak – 1890), Hungarian statesman, Prime Minister of Hungary (1867–1871) and Foreign Minister of Austria-Hungary (1871–1879).

• http://www.vlachovo.eu
• Vlachovo
• https://web.archive.org/web/20071116010355/http://www.statistics.sk/mosmis/eng/run.html

48°47′N 20°25′E / 48.783°N 20.417°E / 48.783; 20.417