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Illinois · HUD 2027 designations

Illinois 2027 QCTs and DDAs by county

HUD's 2027 list puts 617 Illinois census tracts, home to 2,003,826 people in the 2020 Census, in qualified census tracts, across 53 counties; Cook County (352), St. Clair County (23), Winnebago County (23) have the most. 82 ZIP code areas (ZCTAs) are Small Area DDAs. A building in a QCT or DDA can take 130% of eligible basis. The lists apply to allocations and bond issues after December 31, 2026.

6172027 qualified census tracts
2,003,826people in them (2020 Census)
0nonmetro DDA counties
82Small Area DDA ZIP codes

Qualified census tracts by county

Click a column to sort. Each county opens its full tract list.
County2027 QCTsPopulation in QCTsMonitored LIHTC properties in QCTs
Adams County49,2102
Alexander County18990
Boone County15,6400
Champaign County1346,6883
Christian County24,6922
Clay County12,8290
Coles County411,6912
Cook County3521,218,055290
DeKalb County418,5461
DuPage County29,2590
Edwards County12,0550
Franklin County12,5410
Greene County11,5880
Henry County26,3330
Iroquois County13,2271
Jackson County619,8564
Jefferson County11,3561
Johnson County13,4620
Kane County1040,2395
Kankakee County821,3072
Knox County36,6832
La Salle County310,3953
Lake County1558,60910
Logan County13,6921
Macon County1120,4646
Macoupin County15,3292
Madison County1341,62713
Marion County411,2063
McDonough County48,9631
McLean County1033,3997
Montgomery County13,2172
Morgan County26,0342
Peoria County1643,85511
Perry County26,3421
Pulaski County12,5150
Randolph County13,0820
Richland County12,0331
Rock Island County1127,9276
Saline County25,0741
Sangamon County1541,6748
Schuyler County12,0870
St. Clair County2357,7118
Stephenson County24,6080
Tazewell County416,1740
Union County15,2241
Vermilion County821,3543
Wabash County13,0510
Wayne County13,0322
White County11,9990
Whiteside County37,9393
Will County1339,9475
Williamson County37,5743
Winnebago County2361,5338

Sources: HUD 2027 QCT data file (qct_data_2027.xlsx), checked tract by tract against HUD's QCT2027.csv; population from the 2020 Census columns in that file. Properties: HUD's LIHTC database (LIHTCPUB, revised May 28, 2026), monitored properties by 2020 tract.

Small Area DDA ZIP codes

In metro areas HUD designates DDAs by ZIP Code Tabulation Area. A ZCTA follows ZIP code boundaries closely but not exactly, so check a specific address with the lookup.

Metro area2027 Small Area DDA ZCTAs
Chicago-Joliet-Naperville, IL HUD Metro FMR Area60010, 60015, 60021, 60022, 60026, 60029, 60035, 60040, 60042, 60043, 60045, 60047, 60053, 60061, 60062, 60069, 60083, 60088, 60089, 60091, 60093, 60102, 60103, 60107, 60124, 60126, 60134, 60136, 60173, 60175, 60192, 60193, 60194, 60201, 60203, 60208, 60301, 60404, 60422, 60446, 60461, 60463, 60467, 60473, 60478, 60490, 60502, 60504, 60521, 60540, 60544, 60558, 60563, 60564, 60565, 60601, 60602, 60603, 60604, 60605, 60606, 60607, 60610, 60611, 60613, 60614, 60622, 60640, 60642, 60647, 60654, 60657, 60661, 60712
Davenport-Moline-Rock Island, IA-IL MSA61240, 61257
DeKalb County, IL HUD Metro FMR Area60151
Kendall County, IL HUD Metro FMR Area60503, 60585, 60586
Rockford, IL MSA61011, 61065

Changes from the 2026 lists

Compared with HUD's 2026 lists, Illinois gains 52 qualified census tracts and loses 62; 8 Small Area DDA ZIP codes are new and 5 dropped off. A site that dropped off keeps its status for an application filed before 2027 and allocated within 730 days. Every state's changes.

CountyTracts new for 2027Tracts dropped since 2026
Cook County301.03, 307.06, 2311, 4409, 4605, 5201, 6702, 6903, 6911, 7110, 7501, 8045.08, 8051.11, 8081, 8140, 8231.02, 8259, 8290, 8294.01, 8300.07, 8302.01, 8302.02, 8371, 8446107.02, 201, 307.03, 1406.02, 1906.02, 2303, 2603, 2718, 2809, 3005, 3514, 3801, 4206, 5701, 5801, 5806, 6104, 6408, 6701, 6714, 6716, 7115, 7705, 8036.14, 8060.01, 8117.01, 8152, 8247.01, 8248, 8249, 8262.02, 8270, 8275, 8284.02, 8285.08, 8333, 8346, 8350, 8370, 8386, 8438, 8447
Peoria County21, 24, 25, 27.01, 27.02
Winnebago County14, 23.01, 278, 16
Kane County85478513.02, 8534.02
Lake County8624.01, 8626.03, 8627
McLean County21.06, 17
Macon County32
Madison County4015, 4020
Rock Island County235233
Sangamon County628.01
Adams County5
Christian County9589
Clay County9720
Coles County5
Edwards County9571
Jefferson County509
Lawrence County8810
Logan County9532
McDonough County109
Montgomery County9578
Pope County9713
Randolph County9512.02
Saline County9555
St. Clair County5034.11
Tazewell County204
Vermilion County8
Wayne County9552
White County9580
Whiteside County10
Will County8818
Williamson County210.03

Small Area DDA ZIP codes new for 2027: 60040, 60136, 60193, 60463, 60467, 60478, 60647, 61257.

Small Area DDA ZIP codes dropped: 60012, 60112, 60190, 60464, 60491.

Computed by us from HUD's 2026 and 2027 files; 2026 notice: FR Doc. 2025-19007.

Designations: HUD 2027 QCT and DDA designations, FR Doc. 2026-20390 (91 FR 63573, Oct. 6, 2026).

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