Rohnert Park is a city in Sonoma County, California

Sonoma County, California

Sonoma County, located on the northern coast of the U.S. state of California, is the largest and northernmost of the nine San Francisco Bay Area counties. Its population at the 2010 census was 483,878. Its largest city and county seat is Santa Rosa....

, United States, located approximately 50 miles (80.5 km) north of San Francisco. The population at the 2010 United States Census was 40,971. It is an early planned city, modeled directly after Levittown, New York

Levittown, New York

Levittown is a hamlet in the Town of Hempstead located on Long Island in Nassau County, New York. Levittown is midway between the villages of Hempstead and Farmingdale. As of the 2010 census, the CDP had a total population of 51,881....

 and Levittown, Pennsylvania

Levittown, Pennsylvania

Levittown is a census-designated place and planned community in Bucks County, Pennsylvania, United States, within the Philadelphia metropolitan area. The population was 52,983 at the 2010 census. It is above sea level...

. Rohnert Park is the sister city of Hashimoto

Hashimoto, Wakayama

is a city located in Wakayama Prefecture, Japan.The city was founded on January 1, 1955.On March 1, 2006 the town of Kōyaguchi, from Ito District, was merged into Hashimoto....

 in Japan. Sonoma State University

Sonoma State University

Sonoma State University is a public, coeducational business and liberal arts college affiliated with the California State University system. The main campus is located in Rohnert Park, California, United States and lies approximately south of Santa Rosa and north of San Francisco...

, part of the California State University

California State University

The California State University is a public university system in the state of California. It is one of three public higher education systems in the state, the other two being the University of California system and the California Community College system. It is incorporated as The Trustees of the...

 system, is located in the city.
According to the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

, Rohnert Park has a total area of 7 square miles (18.1 km²), 99.93% of it land and 0.07% of it water.
Also, according to the Census Bureau, the city is entirely land.