Serro Ventoso is a civil parish in the municipality of Porto de Mós, Portugal. The population in 2021 was 892, in an area of 34.16 km. It was created in 1933.

Population of the civil parish of Serro Ventoso (1864–2021) Year Pop. ±% 1864 784 —     1878 856 +9.2% 1890 834 −2.6% 1900 979 +17.4% 1911 976 −0.3% 1920 1,012 +3.7% 1930 1,254 +23.9% 1940 1,161 −7.4% 1950 1,173 +1.0% 1960 1,170 −0.3% 1970 1,133 −3.2% 1981 1,078 −4.9% 1991 1,032 −4.3% 2001 1,114 +7.9% 2011 1,026 −7.9% 2021 892 −13.1%