County brief: Williamson County
Texas Bond Review BoardData Center
Debt explorer, Data Center. Showing debt per resident (per county resident) for water districts, fiscal year 2025.
Williamson County's 61 water districts owed $2.04 billion in principal outstanding at the end of fiscal year 2025, $2,805 per county resident, 16th of 87 counties and 5th of 12 (500,000 and over). Of that, $116.1 million is owed by 3 issuers that also serve other counties.
- Debt per resident, per county resident
- $2,805
- Rank
- 16th of 87
- Rank in its size band
- 5th of 12(500,000 and over)
- Total principal outstanding
- $2,040,395,000
- Population (county government's row)
- 727,480
- Of which multi-county issuers
- $116,145,000
Debt by government type
| Type | Issuers | Principal outstanding | Share | Share, as a bar |
|---|---|---|---|---|
| Water Districts | 61 | $2,040,395,000 | 100.0% | |
| Total | 61 | $2,040,395,000 | 100.0% |
Over the years
Largest of the 61 governments
| Issuer | Type | Principal outstanding | Per resident |
|---|---|---|---|
| Brushy Creek Regional UA | Water Districts | $389,745,000 | $1,462 |
| Williamson County MUD 23 | Water Districts | $91,680,000 | $15,318 |
| Brazos RA | Water Districts | $84,630,000 | $31 |
| Williamson County MUD 12 | Water Districts | $65,490,000 | $14,381 |
| Sonterra MUD | Water Districts | $65,020,000 | $4,464 |
| Williamson County MUD 28 | Water Districts | $53,940,000 | $29,236 |
| Williamson County MUD 19 | Water Districts | $51,745,000 | $9,936 |
| Southeast Williamson County MUD 1 | Water Districts | $49,810,000 | $9,549 |
| Siena MUD 1 | Water Districts | $49,215,000 | $9,305 |
| Upper Brushy Creek WCID | Water Districts | $48,465,000 | $121 |
| Williamson County MUD 25 | Water Districts | $48,185,000 | $15,077 |
| Williamson County MUD 19A | Water Districts | $44,435,000 | $12,707 |
| Williamson County MUD 32 | Water Districts | $43,630,000 | $14,442 |
| Jonah Water Special UD | Water Districts | $43,120,000 | $2,199 |
| Williamson County MUD 29 | Water Districts | $42,210,000 | $24,371 |
| Williamson County MUD 31 | Water Districts | $38,725,000 | $13,185 |
| Williamson-Liberty Hill MUD | Water Districts | $37,880,000 | $13,875 |
| Cool Water MUD | Water Districts | $34,245,000 | $12,152 |
43 more issuers: see https://txbrb.munipro.com/data/explore/county/williamson/?type=wd#issuers
How these figures are made. BRB lists every county an issuer serves and gives no shares, so an issuer's debt counts in its home county, the first county listed for it, and each dollar counts once statewide. Of Williamson County's $2,040,395,000, $116,145,000 is owed by 3 issuers that list other counties too; 0 issuers that list Williamson County count in another. Debt per resident divides principal outstanding by the population on Williamson County government's own row (727,480 residents) for the same fiscal year; per resident in the issuer list uses each government's own reported population. "Not reported" is never shown as zero.
Source: Texas Bond Review Board open data on data.texas.gov: Local Issuance Fee By Year (updated by the publisher 10/6/2026); Debt Outstanding By Issuance Local By Year (updated by the publisher 9/9/2026). Loaded here 10/8/2026. Computed here from BRB's tables. Texas fiscal years run September 1 to August 31. Issuer names are shown as BRB publishes them, spellings included. Figures are as reported to the agency and have not been independently verified.