How can I write in a letter,I'm not only worried for my safety but also my family's safety or is it families safety?

Mandy Mustaro: I'm not only worried for my safety, but my family's safety as well.

Angel Klym: I know I'm dumb I am fairly confident it's family's but I just wanna check, thanks

Shane Getler: "Family's".

Elden Dedon: family's. in this sentence you are using the possessive form of family. It is your family, they belong to you. So apostrophe s is correct - it is the possessive.

Dionna Doyel: family's = belonging to one family (that's the one you want)families = more than one familyfamilies' = belonging to more than one family