Cost of Living in DeKalb

DeKalb's cost of living runs genuinely low on housing, offset by a real, elevated effective property tax rate above Illinois's own already-high statewide average.

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Genuinely affordable purchase prices

DeKalb's average home value ran approximately $257,752 per Zillow -- genuinely below both the Illinois statewide figure ($294,136) and the national figure.

A real, elevated property-tax offset

DeKalb's own median effective property tax rate ran 2.44%-2.45% per Ownwell -- above Illinois's already-high 1.88% Tax Foundation statewide average, meaningfully offsetting the low purchase price on an ongoing basis.

Illinois's simple flat income tax applies statewide

Illinois's real, simple flat 4.95% state income tax applies in DeKalb as statewide, with no DeKalb-specific local income tax layer -- and Illinois's real, substantial full retirement-income exemption applies equally here.

Key takeaways

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Last reviewed: 2026-08-25. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.