Cost of living in Rock Island, Illinois

Rock Island, Illinois has about 36,151 people. That count is a 2020–2024 Census average, not a headcount from one day.

A typical home is worth about $125,900.

HUD's fair-market rent for a 2-bedroom in Rock Island County is $1,056 a month. That is the county number, not an apartment listing in Rock Island. It runs from October 2026 through September 2027.

In the Davenport-Moline-Rock Island, IA-IL metro area, prices sit at 89.1 when the U.S. average is 100. That is a 2024 BEA index.

Illinois taxes wages. A typical combined sales tax is 9.0% as of January 1, 2026. That mix is statewide, not Rock Island's exact store tax.

In July 2026, a typical Illinois home paid 19.22¢ per kilowatt-hour. That is a state average from EIA, not Rock Island's bill.

EIA does not publish a Illinois gasoline price. For the week of October 12, 2026, the Midwest (PADD 2) all-grades price was $4.237 a gallon. At 12,000 miles a year and 25 mpg, the index counts that as $2,033.76 a year. Those miles are our standard, not a Census figure, and every town in Illinois shares this price.

Among 648 places we list in Illinois with a rent figure, 471 have higher typical rent than Rock Island.