Collin County Sheriff Unit Numbers

1xx Sheriff's Deputies
- 110 West of US 75
- 120 East of 75, North of 380
- 130 East of 75, South of 380
- 131 Southern split of 130 as staffing permits
- 140 Generally east of Hwy 78 or far Southeast and East, as staffing permits
- 170
4xx Warrant Service, Inspectors, Mental Health Deputies
Constables
- 31xx Constables - Precinct 3 (Southwest Collin County, Plano, Dallas)
- 51xx Constables - Precinct 5 (Farmersville area)
- 61xx Constables - Precinct 6 (Southeast Collin County, Mckinney)
Other Police Agencies
- 71xx Celina Police
- 73xx Josephine Police
- 72xx Farmersville Police
- 74xx Lavon Police
- 75xx Murphy Police
- 76xx Parker Police
- 79xx Princeton Police
- 81xx Texas Parks & Wildlife
- 82xx Anna Police
- 85xx Melissa Police
- 86xx Fairview Public Safety
- DPS uses their DPS assigned unit numbers (1100s, 1200s, and 1300s).
Other Agencies
- 92xx Army Corps of Engineers on Lavon