Back to Counties


View Preliminary Mapping on the RiskMAP site

For more information, please visit the Harris County page on

Detail of events that occur after Flood Insurance Rate Maps are issued Preliminary


In Harris County, only the areas impacted by coastal flooding are being updated under TXCHART. The riverine flood hazard data was updated on the effective Harris County FIRMs in 2007. The Cypress Creek Watershed (northwest portion of the county) is currently begin revised under a separate project to incorporate new flood risk data developed by the Harris County Flood Control District. Revised FIRMs panels were released on September 30, 2010. See or for more information.

Harris County was founded in December 1836 as Harrisburg County. The name was changed to Harris County in December 1839.

In 2000, Harris County has a population of 3,400,578, making it the most populous county in Texas, and the third most populous county in the United States.

The region in Harris County receives annual rainfall averages of 48 to 52 inches. Several historic storms affected the area, including Hurricane Ike in September 2008, and Tropical Storm Allison in June 2001. Tropical Storm Allison was especially destructive and caused significant flooding even outside the designated Special Flood Hazard Areas. To mitigate this, the Tropical Storm Allison Recovery Project (TSARP) was established, culminating in new Special Flood Hazard Area (SFHA) maps in June 2007.

Harris County entered the regular National Flood Insurance Program (NFIP) in May 1970. The current date of the county map is June 2007. Many cities in Harris County also joined the regular NFIP during the 1970s and 1980s.

Harris County and several other communities within the county participate in the Community Rating System (CRS) and enjoy a five to 20 percent discount on flood insurance premiums as of June 2010.

Coastal Barrier Resources Systems are identified by the U.S. Fish and Wildlife Service (USFWS) and can be viewed here.


Image of County Map


 Community   Community ID   Policies in Effect   Insurance in Force   # Paid Losses   $ PaidLosses   Substantial Damage Claims Since 1978 
Harris County48028796,460$ 24,736,539,900.0022,660$ 580,988,065.002,598
City of Baytown4854565,427$ 1,275,039,900.001,814$ 48,906,374.48394
City of Bellaire4802894,784$ 1,416,621,100.00607$ 16,869,927.30116
City of Bunker Hill Village480290667$ 226,684,400.00139$ 4,777,769.457
City of Chelford MUD481568123$ 25,944,900.006$ 33,192.830
City of Deer Park4802915,461$ 1,344,221,200.001,122$ 25,360,697.6892
City of El Lago4854661,063$ 235,378,100.00299$ 7,522,695.4213
City of Friendswood4854687,933$ 2,234,424,300.002,761$ 84,701,028.67347
City of Galena Park480293353$ 65,527,300.0079$ 1,333,391.2610
City of Hedwig Village480294326$ 105,159,200.0072$ 1,850,611.332
City of Hilshire Village480295138$ 42,096,900.0024$ 591,592.241
City of Houston480296142,923$ 33,431,640,000.0035,780$ 1,027,576,943.004,541
City of Humble480297855$ 211,225,400.00488$ 12,693,846.2757
City of Hunter’s Creek Village480298795$ 264,813,400.00102$ 1,873,652.357
City of Jacinto Village480299300$ 55,122,500.0089$ 1,972,009.3011
City of Jersey Village4803001,396$ 386,882,700.00546$ 29,497,944.01120
City of Katy4803011,404$ 363,683,300.0033$ 431,630.351
City of Kingsbridge MUD481567266$ 71,343,000.002$ 33,604.040
City of La Porte4854876,194$ 1,346,310,000.002,075$ 71,338,285.85280
City of League City48548816,486$ 4,635,676,300.002,270$ 40,922,718.30134
City of Longview480264241$ 45,044,700.0080$ 704,029.432
City of Mission Bend MUD #1481578288$ 63,405,600.007$ 47,152.470
City of Missouri City4803044,607$ 1,257,570,400.00283$ 2,211,241.5010
Total AmountsN/A298,490$ 73,840,354,500.0071,338$ 1,962,238,402.538,743

Note: Data from the Community Information System (CIS) July 8, 2010.