Cypress is a village in Johnson County, Illinois, United States. The population was 217 at the 2020 census.

Cypress was established in the late 1890s as a stop along the Chicago and Eastern Illinois Railroad, a Class I railroad. A post office which had been operating at Gray's Mill (east of modern Cypress) was moved to the new location, a former bank. The village's name is likely a reference to the cypress trees that grow in abundance in the Cache River basin. Cypress Grade School was built in 1917, and was damaged by a tornado in April 28, 2002. Around four years later, the current school was finished.

No airports or bus systems are active in Cypress. Bicycling is common inside the village. Train tracks from the Chicago and Eastern Illinois Railroad remain, but have been abandoned since 1984.

• Illinois Route 37

Cypress is located in southwestern Johnson County at 37°21′56″N 89°1′3″W / 37.36556°N 89.01750°W / 37.36556; -89.01750 (37.365543, -89.017473). The village is situated in the Cache River basin northwest of Karnak and southwest of Vienna. The Heron Pond – Little Black Slough Nature Preserve lies to the east of Cypress. Illinois Route 37 passes through the village.

According to the 2010 census, Cypress has a total area of 0.753 square miles (1.95 km), of which 0.75 square miles (1.94 km) (or 99.6%) is land and 0.003 square miles (0.01 km) (or 0.4%) is water.

Historical population

Census	Pop.	Note	%±
1910	311		—
1920	438		40.8%
1930	377		−13.9%
1940	407		8.0%
1950	357		−12.3%
1960	264		−26.1%
1970	261		−1.1%
1980	271		3.8%
1990	275		1.5%
2000	271		−1.5%
2010	234		−13.7%
2020	217		−7.3%
U.S. Decennial Census

As of the census of 2000, there were 271 people, 117 households, and 80 families residing in the village. The population density was 362.7 inhabitants per square mile (140.0/km). There were 128 housing units at an average density of 171.3 per square mile (66.1/km). The racial makeup of the village was 99.26% White, and 0.74% from two or more races.

There were 117 households, out of which 23.1% had children under the age of 18 living with them, 55.6% were married couples living together, 6.0% had a female householder with no husband present, and 31.6% were non-families. 25.6% of all households were made up of individuals, and 14.5% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.81.

In the village, the population was spread out, with 17.7% under the age of 18, 11.8% from 18 to 24, 31.4% from 25 to 44, 22.1% from 45 to 64, and 17.0% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 103.8 males. For every 100 females age 18 and over, there were 97.3 males.

The median income for a household in the village was $30,208, and the median income for a family was $37,813. Males had a median income of $22,750 versus $17,917 for females. The per capita income for the village was $13,849. About 3.1% of families and 7.6% of the population were below the poverty line, including none of those under the age of eighteen or sixty five or over.

• Media related to Cypress, Illinois at Wikimedia Commons