If you already own the media and are looking for standalone subtitle files to load into a player (like VLC or MPC-HC), specialized Polish databases are your best bet:
The most reliable way to watch the series with official Polish subtitles is through major streaming platforms: Family Guy (1999) polskie napisy
: While availability can vary due to licensing changes, it has historically hosted various seasons with Polish localization. Community Subtitle Files If you already own the media and are
: You can purchase individual episodes or full seasons (including Season 1). Most listings include napisy polskie as a standard option. : This is the primary home for Family Guy in Poland
: This is the primary home for Family Guy in Poland. It offers a massive library of seasons, including the latest ones, with the option to choose between Polish subtitles or a Polish voice-over (lektor).