Pedro Bay is a census-designated place located in the U.S. state of Alaska. It is within Lake and Peninsula Borough at the head of Pedro Bay, on the northeast end tip of Iliamna Lake. The St. Nicholas Chapel in Pedro Bay is a historic Russian Orthodox Church that is included on the U.S. National Register of Historic Places. As of 2010 census data, Pedro Bay had a total population of 42 individuals. It has a total area of 19.0 square miles at 59°46′56″N 154°7′57″W. Pedro Bay has estimated per capita income of $18,420. It has Zip code 99647.