Iowa · HUD 2027 designations
Iowa 2027 QCTs and DDAs by county
HUD's 2027 list puts 81 Iowa census tracts, home to 260,836 people in the 2020 Census, in qualified census tracts, across 23 counties; Polk County (19), Johnson County (9), Black Hawk County (7) have the most. 1 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.
Qualified census tracts by county
| County | 2027 QCTs | Population in QCTs | Monitored LIHTC properties in QCTs |
|---|---|---|---|
| Appanoose County | 1 | 2,975 | 1 |
| Audubon County | 1 | 2,248 | 0 |
| Black Hawk County | 7 | 17,202 | 9 |
| Cass County | 1 | 2,898 | 0 |
| Cherokee County | 1 | 2,983 | 1 |
| Clinton County | 2 | 7,366 | 4 |
| Des Moines County | 2 | 7,383 | 2 |
| Dubuque County | 2 | 6,420 | 5 |
| Fayette County | 1 | 2,811 | 0 |
| Hardin County | 1 | 2,114 | 2 |
| Jefferson County | 1 | 2,972 | 2 |
| Johnson County | 9 | 33,633 | 2 |
| Lee County | 1 | 2,106 | 3 |
| Linn County | 6 | 17,347 | 12 |
| Mahaska County | 1 | 2,573 | 2 |
| Muscatine County | 1 | 3,085 | 1 |
| Polk County | 19 | 72,610 | 49 |
| Pottawattamie County | 6 | 17,273 | 14 |
| Scott County | 6 | 14,417 | 13 |
| Story County | 5 | 22,084 | 3 |
| Wapello County | 2 | 5,955 | 2 |
| Webster County | 1 | 1,450 | 4 |
| Woodbury County | 4 | 10,931 | 12 |
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 area | 2027 Small Area DDA ZCTAs |
|---|---|
| Davenport-Moline-Rock Island, IA-IL MSA | 52756 |
Changes from the 2026 lists
Compared with HUD's 2026 lists, Iowa gains 9 qualified census tracts and loses 13; 1 Small Area DDA ZIP codes are new and 0 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.
| County | Tracts new for 2027 | Tracts dropped since 2026 |
|---|---|---|
| Polk County | 3, 47.01 | 4 |
| Black Hawk County | 2 | 8 |
| Johnson County | 104.01 | 23 |
| Scott County | 113, 114 | |
| Story County | 11.02 | 5 |
| Wapello County | 9605, 9606 | |
| Audubon County | 702 | |
| Clinton County | 3 | |
| Dallas County | 504 | |
| Dubuque County | 12.02 | |
| Fayette County | 805 | |
| Hardin County | 4802 | |
| Lee County | 4909 | |
| Linn County | 18 | |
| Webster County | 3 |
Small Area DDA ZIP codes new for 2027: 52756.
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).
More Iowa data
- LIHTC in Iowaagency, QAP, ceiling
- Year 15 and Year 30 propertiesby county
- QCT and DDA lookupby address
- The 130% basis boostguide
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