- Montgomery County Animal Shelter (MCAS) - Promotes humane treatment of animals, prevents cruelty to animals, and provides a facility to return animals to their rightful owners
- Montgomery County Housing Authority - Provides housing and homeownership opportunities for low and moderate income persons and families.
- Montgomery County - County Clerk - County Courts - Tax Office - District Courts
- Montgomery Central Appraisal District - Provides information relating to duties of the Montgomery Central Appraisal District
- Montgomery County Office of Emergency Management (OEM) - Planning, coordination, and implementation of all emergency management and Homeland Security related activities for Montgomery County.
- Montgomery County Sheriff's Office - Seventh largest Sheriff's Office in Texas. Montgomery County is located adjacent and north of Houston, Harris County.
- Montgomery County Emergency Assistance - A private, non-profit agency created to serve the residents of Montgomery County, Texas who are experiencing an unexpected financial need or crisis.
- Montgomery County memorial Library System - Resource for information, education, culture, and recreation, contributing to life-long learning, and adapted to the special needs and interests of the community.
- Montgomery Independent School District - Information to help parents choose the right public school for their children in the Montgomery Independent School District.
- Texas AgriLife Extension Service in Montgomery County - A unique education agency, the Texas AgriLife Extension Service teaches Texans wherever they live, extending research-based knowledge to benefit their families and communities.
- Montgomery County Hospital District - Promotes a healthy, resilient community through health education, disease prevention, clinical services and emergency preparedness.
- Montgomery County Police Reporter - Local area news.