According to the United States Census Bureau, the city has a total area of 29.9 square miles (77.5 km²), of which, 28.6 square miles (74.0 km²) of it is land and 1.4 square miles (3.5 km²) of it (4.54%) is water.
The following neighborhoods are located in Cranston:
Over 30% of Cranston's residents describe themselves as Italian American, one of the highest percentages of this ethnic group in cities with over 50,000 residents in the United States.
Cranston is a part of the Providence metropolitan area, which has an estimated population of 1,622,520.
There were 30,954 households, out of which 28.7% had children under the age of 18 living with them, 49.2% were married couples living together, 12.5% had a female householder with no husband present, and 34.6% were non-families. 29.4% of all households were made up of individuals and 13.1% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 3.01.
In the city the population was spread out, with 21.6% under the age of 18, 7.7% from 18 to 24, 31.5% from 25 to 44, 22.0% from 45 to 64, and 17.3% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 95.9 males. For every 100 females of age 18 or over, there were 92.8 males.
The median income for a household in the city was $44,108, and the median income for a family was $55,241. Males had a median income of $40,031 versus $28,279 for females. The per capita income for the city was $21,978. About 5.6% of families and 7.3% of the population were below the poverty line, including 8.6% of those under age 18 and 8.5% of those age 65 or over.
Cranston is served by Rhode Island Public Transit Authority (RIPTA) buses. Amtrak's Northeast Corridor passes through but has no station in the city. The MBTA's Providence/Stoughton Line will also pass through upon the completion of the new train station at T.F. Green Airport, but will not include a station in Cranston.
The first auto race track in the country, Narragansett Park, opened in present-day Stadium in September 1886.
Cranston is home to the Budlong Pool, one of the largest outdoor swimming pools in the country. Built in the 1950s as a Works Progress Administration project, it is a staple of the community. It is located at 198 Aqueduct Road, off Reservoir Avenue (part of RI 2).
The Cranston Country Club is the only public golf course in Cranston.