thumb|Big Lake (the curved area in the upper left) on June 15, 2011, during the [[2011 Missouri River floods with the Missouri River in the foreground.]]
thumb|Big Lake from [[Fortescue, Missouri after being obliterated on June 26, 2011, in the flood]]
Big Lake is a village in western Holt County, Missouri, United States. The population was 65 at the 2020 census.
The village is located on the Big Lake, which is the largest oxbow lake in Missouri. It is also adjacent to Big Lake State Park, which has the largest marsh in a state park in the state of Missouri.
Geography
The actual lake of Big Lake was originally part of the Missouri River. The lake was formed when the river changed course, leaving the lake behind.
According to the United States Census Bureau, the village has a total area of , of which is land and is water.
Big Lake is approximately west of Mound City on Route 111, off Route 118.
Big Lake is about from the village of Rulo, Nebraska.
Demographics
2010 census
As of the census of 2010, there were 159 people, 84 households, and 50 families residing in the village. The population density was . There were 386 housing units at an average density of . The racial makeup of the village was 97.5% White, 1.3% African American, and 1.3% Native American.
There were 84 households, of which 8.3% had children under the age of 18 living with them, 54.8% were married couples living together, 1.2% had a female householder with no husband present, 3.6% had a male householder with no wife present, and 40.5% were non-families. 39.3% of all households were made up of individuals, and 8.4% had someone living alone who was 65 years of age or older. The average household size was 1.89 and the average family size was 2.44.
The median age in the village was 55.6 years. 8.2% of residents were under the age of 18; 3.2% were between the ages of 18 and 24; 11.3% were from 25 to 44; 47.8% were from 45 to 64; and 29.6% were 65 years of age or older. The gender makeup of the village was 52.2% male and 47.8% female.
2000 census
As of the census