County directory · Texas · 2026–27
School districts in Harris County, TX
Harris County has 19 regular public school districts, enrolling 721,415 students in 2024–25. The largest is Houston ISD (176,727 students, 24% of the county), followed by Cypress-Fairbanks ISD and Aldine ISD. 18 of the 19 offer kindergarten. Texas's kindergarten cutoff: turn 5 by September 1.
The 19 districts, largest first
| District and office | Grades | Schools | Students | Kindergarten | District office contact |
|---|---|---|---|---|---|
| Houston ISD 4400 W 18TH ST, HOUSTON | Pre-K–12 | 273 | 176,727 | 12,164 | (713) 556-6005 |
| Cypress-Fairbanks ISD 11440 MATZKE RD, CYPRESS | Pre-K–12 | 94 | 117,927 | 7,220 | (281) 897-4000 |
| Aldine ISD 2520 W W THORNE DR, HOUSTON | Pre-K–12 | 71 | 56,419 | 3,512 | (281) 449-1011 |
| Klein ISD 7200 SPRING-CYPRESS RD, KLEIN | Pre-K–12 | 53 | 52,437 | 3,101 | (832) 249-4000 |
| Humble ISD 10203 BIRCHRIDGE DR, HUMBLE also serves Montgomery County | Pre-K–12 | 52 | 48,502 | 2,814 | (281) 641-1000 |
| Pasadena ISD 3920 MICKEY GILLEY BLVD, PASADENA | Pre-K–12 | 67 | 46,491 | 2,792 | (713) 740-0000 |
| Alief ISD 4250 COOK RD, HOUSTON | Pre-K–12 | 47 | 38,610 | 2,581 | (281) 498-8110 |
| Spring ISD 16717 ELLA BLVD, HOUSTON | Pre-K–12 | 42 | 33,590 | 2,337 | (281) 891-6000 |
| Spring Branch ISD 955 CAMPBELL RD, HOUSTON | Pre-K–12 | 45 | 32,668 | 2,238 | (713) 464-1511 |
| Goose Creek CISD 4544 INTERSTATE 10 E, BAYTOWN also serves Chambers County | Pre-K–12 | 33 | 24,032 | 1,601 | (281) 420-4800 |
| Tomball ISD 310 S CHERRY ST, TOMBALL also serves Montgomery County | Pre-K–12 | 27 | 22,913 | 1,458 | (281) 357-3100 |
| Galena Park ISD 14705 WOODFOREST BLVD, HOUSTON | Pre-K–12 | 26 | 20,862 | 1,263 | (832) 386-1000 |
| Deer Park ISD 2800 TEXAS AVE, DEER PARK | Pre-K–12 | 15 | 12,165 | 731 | (832) 668-7000 |
| Sheldon ISD 11411 C E KING PKWY, HOUSTON | Pre-K–12 | 14 | 10,946 | 636 | (281) 727-2000 |
| Channelview ISD 828 SHELDON RD, CHANNELVIEW | Pre-K–12 | 11 | 9,335 | 548 | (281) 452-8002 |
| La Porte ISD 1002 SAN JACINTO ST, LA PORTE also serves Chambers County | Pre-K–12 | 13 | 7,099 | 432 | (281) 604-7000 |
| Crosby ISD 14670 FM 2100, CROSBY | Pre-K–12 | 9 | 7,046 | 486 | (281) 328-9200 |
| Huffman ISD 24302 F M 2100, HUFFMAN | Pre-K–12 | 4 | 3,646 | 222 | (281) 324-1871 |
| Harris County Dept of Ed 6300 IRVINGTON BLVD, HOUSTON | — | 0 | — | — | (713) 694-6300 |
Harris County at a glance
Together the 19 districts run 896 schools from offices in 12 towns. The smallest by enrollment is Huffman ISD, with 3,646 students; the median Harris County district has 24,032. By grade span: 18 Pre-K–12 and 1 without a reported span. Without kindergarten: Harris County Dept of Ed (—).
Kindergarten in 2024–25, counting the 18 districts that report a K grade: 46,136 children. The biggest kindergarten was Houston ISD's, with 12,164; Cypress-Fairbanks ISD had 7,220, and the smallest, Huffman ISD, had 222.
Harris County holds 19 of Texas's 1,022 regular districts (1.9%) and 14% of its 5,108,224 public school students, ranking 1st of 253 counties by number of districts and 1st by enrollment. By size, 17 enroll 5,000 or more and 1 enroll 1,000 to 4,999, and the average school here has about 805 students.
4 districts reach past the county line: Humble ISD (into Montgomery County), Goose Creek CISD (into Chambers County), Tomball ISD (into Montgomery County) and La Porte ISD (into Chambers County).
Which district am I in?
Each district draws its own attendance zones, so your home address decides it, and with 4 of Harris County's districts crossing county lines the county alone won't. There is no address lookup here; ask the district. Each one's own site:
Houston ISD · Cypress-Fairbanks ISD · Aldine ISD · Klein ISD · Humble ISD · Pasadena ISD · Alief ISD · Spring ISD · Spring Branch ISD · Goose Creek CISD · Tomball ISD · Galena Park ISD · Deer Park ISD · Sheldon ISD · Channelview ISD · La Porte ISD · Crosby ISD · Huffman ISD · Harris County Dept of Ed
What grade will my child be in?
More in Texas
Every Texas district by county · Texas kindergarten cutoff
More Texas county directories: Collin County (14) · Dallas County (15) · Grayson County (13) · Hidalgo County (16) · Nueces County (12) · Tarrant County (16)