Hermsdorf (German pronunciation: [ˈhɛʁmsˌdɔʁf] ; Upper Sorbian: Hermanecy) is a municipality in the Oberspreewald-Lausitz district, in Upper Lusatia, Brandenburg, Germany.

From 1815 to 1825, Hermsdorf was part of the Prussian Province of Brandenburg, from 1825 to 1919 of the Province of Silesia, from 1919 to 1938 of the Province of Lower Silesia, again from 1938 to 1941 of the Province of Silesia and again from 1941 to 1945 of the Province of Lower Silesia. From 1945 to 1952 it was part of Saxony and from 1952 to 1990 of the Bezirk Cottbus of East Germany.

Hermsdorf: Population development
within the current boundaries (2013)

Year Pop. ±% p.a. 1875 400 —     1890 400 +0.00% 1910 550 +1.61% 1925 593 +0.50% 1933 575 −0.38% 1939 836 +6.44% 1946 1,122 +4.29% 1950 1,236 +2.45% 1964 1,263 +0.15% 1971 1,210 −0.61% 1981 1,091 −1.03% 1985 1,043 −1.12% 1989 1,045 +0.05% 1990 1,040 −0.48% 1991 1,034 −0.58% 1992 1,020 −1.35% 1993 1,010 −0.98% 1994 1,023 +1.29% 1995 1,007 −1.56% 1996 1,010 +0.30%

Year Pop. ±% p.a. 1997 1,019 +0.89% 1998 1,013 −0.59% 1999 1,014 +0.10% 2000 1,020 +0.59% 2001 1,029 +0.88% 2002 952 −7.48% 2003 942 −1.05% 2004 930 −1.27% 2005 924 −0.65% 2006 908 −1.73% 2007 893 −1.65% 2008 874 −2.13% 2009 856 −2.06% 2010 839 −1.99% 2011 813 −3.10% 2012 808 −0.62% 2013 803 −0.62% 2014 795 −1.00% 2015 797 +0.25% 2016 796 −0.13%