Quick answer
Illinois has lower average 1BR rent ($1,850/mo vs $2,400/mo). State income tax: Illinois (4.95%) vs District of Columbia (10.75% (top)) — on a $120K salary that's $4,260/year difference.
State Comparison · 2026
Illinois vs District of Columbia
Side-by-side on state income tax, rent, home prices, climate, and top metros — with specific dollar numbers for every claim.
Last updated: April 23, 2026
Illinois vs District of Columbia at a Glance
| Metric | Illinois | District of Columbia |
|---|---|---|
| Avg 1BR rent (major metros) | $1,850 ✓ | $2,400 |
| Avg median home price | $340K ✓ | $650K |
| Cheapest city | Chicago ($1,850) ✓ | Washington, DC ($2,400) |
| Priciest city | Chicago ($1,850) | Washington, DC ($2,400) |
| State income tax | 4.95% ✓ | 10.75% (top) |
| Avg walkability | 78/100 ✓ | 78/100 |
| Cities tracked | 1 | 1 |
✓ marks the lower or more favorable value. Averages use the major metros we track in each state.
State Income Tax: Real Savings
What the rate gap actually looks like in your paycheck. Lower rate: Illinois (4.95%).
Salary $80K
$2,840
/year saved in Illinois
Salary $120K
$4,260
/year saved in Illinois
Salary $200K
$7,100
/year saved in Illinois
Calculation uses the effective state rate difference × gross salary. Doesn't include property tax, sales tax, or federal impact.
Deep Dive: Each State
Illinois (IL)
Tax reality
Illinois has a flat 4.95% state income tax (moderate) — but property taxes are among the highest in the US, averaging 2.1% effective. On a $350K Chicago home that's $7,400/year. Combined tax burden is higher than it looks. The state's pension underfunding creates long-term fiscal risk for homeowners.
Top cities (1 tracked)
Top drawbacks
- ✕Property tax is brutal — Cook County averages 2.3% effective. On a $500K home, that's $11,500/year. Homeowners feel this every month.
- ✕Chicago winters are genuinely cold. Lake-effect snow, mid-December through March subzero streaks, and winds off Lake Michigan can make it feel -20°F. This is the biggest filter for people considering moving here.
- ✕The state fiscal situation (pension debt, budget pressures) drives ongoing policy uncertainty — property tax, sales tax, and various fees continue to drift upward.
District of Columbia (DC)
Tax reality
DC has 10.75% top income tax (highest in the nation) PLUS you pay federal taxes — no local alternative. A $150K earner pays ~$30K in combined federal + DC income tax. The tradeoff: recession-proof federal job market, world-class walkability, and no need for a car (saving $600+/month).
Top cities (1 tracked)
Top drawbacks
- ✕Taxation is punishing — 10.75% local income tax combined with federal income tax means high earners pay 37-50% marginal rates. Capital gains tax applies at full income tax rate (not preferential), making real estate sales and investments expensive. This is the highest combined rate in the US.
- ✕No Congressional representation — DC has a Non-Voting Delegate but cannot pass laws without Congressional approval. Congress controls DC's budget. This is frustrating on principle and practically limits local autonomy.
- ✕Summer humidity is extreme — June-August average 90°F+ with 75%+ humidity, making heat index feel 100-108°F. Outdoor activity collapses. This is worse than the South because of the Potomac humidity.
Frequently Asked Questions
Is Illinois or District of Columbia cheaper to live in?
Illinois has lower average 1BR rent across major metros — $1,850/mo vs $2,400/mo in District of Columbia, a $550/mo difference. Home prices: Illinois median is $340K vs $650K.
Illinois vs District of Columbia: which has lower state income tax?
Illinois has lower state income tax (4.95%) vs 10.75% (top) in District of Columbia. On an $80K salary that's $2,840/year in savings. On $200K, savings grow to $7,100/year.
Should I move from Illinois to District of Columbia?
Illinois has a flat 4.95% state income tax (moderate) — but property taxes are among the highest in the US, averaging 2.1% effective. On a $350K Chicago home that's $7,400/year. Combined tax burden is higher than it looks. The state's pension underfunding creates long-term fiscal risk for homeowners.
What are the best cities in Illinois vs District of Columbia?
Illinois's largest metros include Chicago. District of Columbia's largest metros include Washington, DC. Cost of living varies significantly within each state — a Illinois suburb can be 40% cheaper than its flagship city, and vice versa.