Seiça () is a

civil parish In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, w ...

in the municipality of

Ourém Ourém (, ), formerly known as Vila Nova de Ourém, is a municipality in the district of Santarém in Portugal. The population in 2011 was 45,932, in an area of 416.68 km2. The municipality of Ourém contains two cities: Ourém (about 12,000 ...

, Portugal. The population in 2021 was 1,879, down from 2,076 in 2011,Instituto Nacional de Estatística (INE)
Census 2011 results according to the 2013 administrative division of Portugal in an area of 25.14 km².

References

Freguesias of Ourém {{Santarém-geo-stub