Geography of Calhoun County, Texas

Calhoun County, located in the southeastern part of the state of Texas, USA, is a region known for its coastal beauty, diverse ecosystems, and rich cultural heritage. Encompassing an area of approximately 1,032 square miles, the county offers a blend of coastal plains, marshlands, and scenic waterways. In this comprehensive overview, we will explore the geography, climate, rivers, lakes, and other notable features that define Calhoun County. Check acronymmonster to learn more about the state of Texas.


Calhoun County is bordered by the counties of Victoria to the northwest, Jackson to the northeast, and Matagorda to the southwest. To the southeast, it is bordered by the Gulf of Mexico, making it a coastal county. The county seat and largest city is Port Lavaca, while other significant communities include Seadrift, Point Comfort, and Port O’Connor.

The topography of Calhoun County is primarily flat coastal plains, with elevations gradually increasing as one moves inland. The county is characterized by its numerous bays, estuaries, and barrier islands, which contribute to its unique coastal ecosystem. Matagorda Island, part of the county, is one of the largest barrier islands along the Texas coast and is renowned for its natural beauty and wildlife.


Calhoun County experiences a humid subtropical climate, with hot, humid summers and mild winters. The region’s climate is influenced by its proximity to the Gulf of Mexico and the prevailing weather patterns of the southern United States.

Summer temperatures in Calhoun County typically range from the 80s to 90s°F (27-32°C) during the day, with high humidity levels making it feel hotter. Heatwaves are common during the summer months, with temperatures occasionally reaching into the 100s°F (38°C) or higher.

Winter temperatures in Calhoun County are relatively mild, with daytime temperatures ranging from the 50s to 60s°F (10-15°C) and nighttime temperatures dropping into the 40s°F (4-9°C). Frost is rare, and snowfall is virtually unheard of in this coastal region.

Spring and fall are transitional seasons in Calhoun County, with temperatures gradually warming in the spring and cooling in the fall. These seasons are favored by residents and visitors alike for outdoor activities such as fishing, birdwatching, and enjoying the county’s scenic coastline.

Rivers and Lakes:

Calhoun County is intersected by several creeks, streams, and rivers, which play important roles in the region’s ecology, economy, and recreational activities.

The Lavaca River is one of the major rivers in Calhoun County, flowing from northwest to southeast through the central part of the county. The river provides opportunities for fishing, boating, and water sports, as well as scenic views and wildlife habitat along its banks.

In addition to its rivers and streams, Calhoun County is home to several small lakes and reservoirs, including Carancahua Bay and Chocolate Bay. These bodies of water provide opportunities for fishing, boating, swimming, and birdwatching, attracting residents and visitors alike to their shores.

Natural Features:

In addition to its rivers and lakes, Calhoun County is known for its natural beauty and diverse ecosystems, including wetlands, marshes, and coastal prairies.

The Aransas National Wildlife Refuge, located on the eastern edge of Calhoun County, is a protected area that encompasses over 115,000 acres of marshes, tidal flats, and coastal grasslands. The refuge is home to a diverse array of wildlife, including migratory birds, alligators, and endangered species such as the whooping crane.

The Matagorda Island State Park, located off the coast of Calhoun County, is a scenic park that features sandy beaches, dunes, and tidal flats. The park offers opportunities for swimming, beachcombing, birdwatching, and wildlife viewing, as well as primitive camping in designated areas.

The Guadalupe Delta Wildlife Management Area, located in the northern part of Calhoun County, is a protected area that encompasses over 9,000 acres of wetlands, marshes, and tidal creeks. The area offers opportunities for hunting, fishing, birdwatching, and wildlife photography, as well as hiking and nature study along its scenic trails.


Calhoun County, Texas, offers a diverse and scenic landscape characterized by its coastal beauty, diverse ecosystems, and rich cultural heritage. From its historic towns and cultural landmarks to its outdoor recreational opportunities and natural beauty, the county has much to offer residents and visitors alike. As stewards of this remarkable landscape, residents and local organizations are committed to preserving and protecting Calhoun County for future generations to enjoy. Through conservation efforts, sustainable development, and responsible stewardship of natural resources, Calhoun County will continue to thrive as a vibrant and cherished part of the Texas Gulf Coast region.