Mengeš (pronounced [ˈmeːŋɡəʃ] ; ‹See Tfd›German: Mannsburg) is a town in the Upper Carniola region of Slovenia. It is the seat of the Municipality of Mengeš. It is located approximately fifteen kilometers from the Slovenian capital of Ljubljana. It includes the hamlets of Zavrti, Veliki Mengeš (‹See Tfd›German: Großmannsburg), Mali Mengeš (‹See Tfd›German: Kleinmannsburg), and Pristava.

Mengeš was first attested in written sources in 1154–56 as Meingosburg (and as Mengospurch in 1214–20, Mengozesburc in 1226, and Meingospurch in 1243). The Slovene name is a clipped form of Middle High German Meingos(purch), which is a compound of Meingoz (a personal name) + purch 'castle', thus meaning 'castle belonging to Meingoz'. In the past the German name was Mannsburg.

The parish church in the town is dedicated to Archangel Michael.

Notable people that were born or lived in Mengeš include:

• Ferdinand Augustin Hallerstein (1703–1774), astronomer, mathematician
• Janez Trdina (1830–1905) writer, historian
• Jurij Andrej Gallenfels (1651–1699), Renaissance humanist
• Ignac Holzapfel (1799–1868), poet
• Anton Koblar (1854–1928), historian
• Franc Lah (1816–1890), sculptor
• Lovro Letnar (1855–1913), schoolmaster
• Anton Mrkun (1876–1961), priest and historian
• Franc Ropret (1878–1952), sculptor
• Miha Stare (1790–1872), businessman

  Historical population

  Year	Pop.	±%
  1948	2,115	—
  1953	2,242	+6.0%
  1961	2,766	+23.4%
  1971	3,240	+17.1%
  1981	4,193	+29.4%
  1991	5,200	+24.0%
  2002	5,557	+6.9%
  2011	6,112	+10.0%
  2021	7,010	+14.7%
  Population size may be affected by changes in administrative divisions.

• 
  Park with castle on the right

• Media related to Mengeš at Wikimedia Commons
• Mengeš on Geopedia