Lake Latonka is a census-designated place in Coolspring and Jackson Townships in Mercer County, Pennsylvania, United States.

[4] It surrounds the Lake Latonka reservoir.

As of the 2020 census, there were 951 people, 346 families, and 610 housing units in Lake Latonka.

Hispanic and Latino people made up 1% of the population.

[6] The ancestry of the CDP was 19.6% German, 17.4% English, 14.4% Italian, 13.3% Irish, 8.0% Scotch-Irish, 5.7% French, 5.1% Polish, and 3.2% Hungarian.