Updated 2026 · Based on median market data for Decatur, IL
Decatur's price-to-income ratio is 1.9x — homes cost 1.9 times the local median household income of $62,333. This is very affordable by national standards. A household earning the median income could qualify for a home at the median price with a standard mortgage, which means rental demand comes from lifestyle choice and transient populations rather than inability to buy. The national average price-to-income ratio is approximately 4.5x, putting Decatur below the national norm.
A typical mortgage payment on a median-priced home in Decatur (20% down at 7%) is approximately $638/mo for principal and interest alone — add taxes and insurance and the all-in payment reaches roughly $884/mo. The median rent of $1,120/mo is actually comparable to or more than the cost of buying — this is unusual and may signal rent correction risk, as tenants realize they could build equity for a similar monthly outlay. Monitor this ratio over time — if buying becomes cheaper than renting, expect some tenant attrition as renters convert to homeowners. The gap between $1,120 in rent and $884 in ownership costs is a structural driver of your occupancy rates.
The median household income in Decatur is $62,333, with a population of 50,000 growing at 0.2% per year. Decatur is a smaller market. Research the local employment base carefully — smaller cities can be significantly impacted by a single employer relocating or downsizing. Hospital systems, universities, and military bases provide the most stable employment in small markets. Moderate incomes support a working-class to middle-class tenant base.
At just 22% of income going to rent, Decatur tenants have significant disposable income after housing costs. This translates to reliable rent payments, lower eviction risk, and willingness to pay premiums for quality units. The affordable rent ceiling based on 30% of median income is $1,558/mo. Current rents are well below this ceiling, giving landlords room to push rents on upgraded units without exceeding affordability limits. Renters here include a mix of young professionals not yet ready to buy and transient populations.
Decatur is a smaller market with flat growth. Stability depends heavily on the local employment base. The tight 5.9% vacancy rate signals strong current demand with little risk of near-term oversupply. Diversify across 2-3 neighborhoods within Decatur to reduce sub-market concentration risk.
Entry into Decatur's rental market requires approximately $27,600 in total capital per property — $24,000 for the 20% down payment plus roughly $3,600 in closing costs, inspections, and initial repairs. This is an exceptionally low barrier to entry. An investor with $150,000 in deployable capital could acquire 2-3 properties, diversifying across neighborhoods and reducing per-unit risk. The low price point makes Decatur one of the most accessible markets for first-time investors. Maintain reserves of at least 6 months of expenses (approximately $5,304 per property) before acquiring. The optimal portfolio size in Decatur depends on your capital and management capacity, but 3-5 properties provides meaningful diversification while remaining manageable for a hands-on investor.
Decatur offers an attractive combination: affordable prices keep your entry cost low while strong rent-to-price ratios drive cash flow. The affordable price point also means more residents can eventually buy, providing a natural exit strategy if you ever sell to an owner-occupant buyer who will pay a premium over investor pricing. The bottom line: Decatur's cost of living profile strongly favors rental investors through low entry costs and strong income ratios.
Decatur vs Illinois state average and national average across key investment metrics. Decatur outperforms both benchmarks on cap rate.