Nicolas "Nic" Mosar (25 November 1927 – 6 January 2004) was a Luxembourgish politician, jurist, and diplomat.

Nicolas Mosar
Mosar in 1986
European Commissioner for Energy
In office
5 January 1985 – 5 January 1989
PresidentJacques Delors
Preceded byÉtienne Davignon
Succeeded byAntónio Cardoso e Cunha
President of the Christian Social People's Party
In office
1972–1974
Preceded byJean Dupong
Succeeded byJacques Santer
Personal details
Born(1927-11-25)25 November 1927
Died6 January 2004(2004-01-06) (aged 76)
Political partyChristian Social People's Party

A Christian Social People's Party (CSV) member, Mosar was elected to the communal council of Luxembourg City in 1959, and sat in the council until 1984, including a period as an échevin. He first entered the Chamber of Deputies in 1969, and, excluding a two-year spell out (1974–1976) after the CSV's 1974 election defeat, sat in the Chamber until 1984. During this time, he was also President of the CSV (1972–1974).

Leaving domestic politics, Mosar replaced Gaston Thorn as Luxembourg's European Commissioner in 1985, taking on the brief of European Commissioner for Energy. After four years in the job, he moved to bilateral diplomacy, becoming Luxembourg's Ambassador to Italy (1989–1992).

He died in 2004. His son, Laurent, now sits in the Chamber of Deputies and Luxembourg City council for the CSV, just as Nicolas had.

Political offices
Preceded by European Commissioner for Energy
1985–1989
Succeeded by
Preceded by Luxembourgian European Commissioner
1985–1989
Succeeded by