Most Expensive Cities in Illinois

Most expensive cities in Illinois (population > 5,000) ranked by cost of living index.

Data current as of September 2026. Sources: US Census Bureau, Zillow, HUD, BEA.

#	City	Cost Index	Income	Rent	Population
1	Glencoe	211	$250,001	$2,097/mo	8,715
2	Long Grove	203	$235,368	$3,501/mo	8,266
3	Inverness	200	$215,810	$3,501/mo	7,541
4	Oak Brook	196	$171,123	$2,921/mo	8,028
5	Northfield	191	$180,492	$2,917/mo	5,683
6	Winnetka	188	$250,001	$1,750/mo	12,508
7	Burr Ridge	184	$154,508	$3,000/mo	11,119
8	Lincolnwood	181	$107,950	$3,501/mo	13,179
9	Hinsdale	178	$250,001	$1,981/mo	17,155
10	South Barrington	175	$211,083	$1,917/mo	5,004
11	Lake Forest	175	$228,120	$2,120/mo	19,190
12	Lincolnshire	168	$179,735	$2,655/mo	7,937
13	Lake Barrington	166	$132,857	$3,060/mo	5,400
14	Wilmette	161	$192,300	$1,968/mo	27,550
15	Northbrook	159	$155,321	$2,334/mo	34,642
16	Deerfield	157	$189,705	$2,345/mo	19,185
17	Lake Bluff	152	$205,735	$1,826/mo	5,834
18	Western Springs	151	$218,839	$1,932/mo	13,353
19	Glenview	146	$138,758	$2,027/mo	47,682
20	Highland Park	142	$161,875	$1,903/mo	30,229
21	Barrington	141	$150,714	$1,886/mo	11,049
22	Frankfort	140	$153,714	$2,175/mo	20,417
23	Elmhurst	136	$145,374	$1,877/mo	45,538
24	La Grange	135	$154,556	$1,679/mo	15,999
25	River Forest	134	$148,711	$1,411/mo	11,489
26	Naperville	134	$150,937	$1,852/mo	149,424
27	Morton Grove	134	$106,078	$2,210/mo	24,687
28	Hampshire	133	$107,774	$2,356/mo	8,351
29	Buffalo Grove	130	$129,820	$2,042/mo	42,824
30	Palos Heights	129	$107,974	$2,138/mo	11,817
31	Highwood	128	$101,862	$1,800/mo	5,243
32	Flossmoor	128	$137,768	$2,191/mo	9,666
33	Volo	128	$145,906	$2,229/mo	6,398
34	Evanston	126	$95,766	$1,698/mo	76,552
35	Park Ridge	126	$138,059	$1,511/mo	39,241
36	Plainfield	126	$142,265	$1,889/mo	45,705
37	Shorewood	126	$122,648	$2,087/mo	18,218
38	Wheaton	125	$119,566	$1,731/mo	53,453
39	Geneva	125	$136,621	$1,805/mo	21,299
40	Hawthorn Woods	124	$238,114	—	9,145
41	Lake Zurich	124	$139,959	$1,782/mo	19,727
42	Vernon Hills	124	$120,625	$1,855/mo	26,772
43	Libertyville	123	$162,270	$1,537/mo	20,493
44	Homer Glen	121	$128,546	$1,737/mo	24,516
45	Arlington Heights	121	$118,532	$1,727/mo	76,220
46	Bartlett	121	$130,479	$1,857/mo	40,531
47	Campton Hills	121	$192,727	$1,424/mo	10,724
48	Itasca	121	$111,898	$1,779/mo	9,525
49	St. Charles	120	$115,350	$1,788/mo	32,733
50	Downers Grove	120	$119,649	$1,589/mo	49,867

See also: Cheapest Cities in Illinois · Illinois Overview