Sild is an Estonian language surname meaning "bridge".
As of 1 January 2021, 524 men and 544 women in Estonia have the surname Sild. Sild is ranked the 65th most common surname for men in Estonia and 61st for women. The surname Sild is most common in Viljandi County, where 21.55 per 10,000 inhabitants of the county bear the surname.Nimede statistika. Sutt. 1 January 2020. Retrieved 7 February 2021.
Notable people bearing the surname Sild include:
Arno Sild (born 1947), politician Eili Sild (born 1942), actress Heino Sild (1944–2009), shot putter Lauri Sild (born 1990), orienteer Sixten Sild (born 1964), orienteer Timo Sild (born 1988), orienteer
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