The name of the settlement was first attested in 1291 as Syroch (and as Seyroch in 1307 and Syroch in 1318). It is probably derived from a plural form of the hypocorism *Žirъ, and the name would therefore mean 'Žir and his people'. An alternative, less likely theory, connects the name to the Slovene common noun žir 'beech nuts'.[2]
An Austrian post office was established in Žiri in 1871 under the name Sairach, district of Loitsch (Logatec). The Slovene name was added to the postal name at the end of the 19th century.[4]
Historical population
Year
Pop.
±%
1948
598
—
1953
651
+8.9%
1961
667
+2.5%
1971
627
−6.0%
1981
577
−8.0%
1991
3,442
+496.5%
2002
3,593
+4.4%
2011
3,588
−0.1%
2021
3,654
+1.8%
Population size may be affected by changes in administrative divisions.
^ ab"Uebersicht der in Folge a. h. Entschließung vom 26. Juli 1849 genehmigten provisorischen Gerichtseintheilung des Kronlandes Krain". Intelligenzblatt zur Laibacher Zeitung. No. 141. November 24, 1849. p. 5.
^ abSnoj, Marko. 2009. Etimološki slovar slovenskih zemljepisnih imen. Ljubljana: Modrijan and Založba ZRC, pp. 490–491.