I am looking for a death index for Welland County that covers 1947-1960. Where can I find this?

For the 1947-1960 time period the earliest you would be able to access a death index is 2019 and only for the year 1947 (1948 would be available in 2020, 1949 in 2021, and so on). As explained on our page for Death Records there is a privacy law restricting the release of death registrations for 72 years unless you are next-of-kin or the legal representative of the deceased.

An alternative would be to seek out cemetery records. See:

OCFA

Niagara Branch OGS

CanadaGenWeb's Cemetery Project