KATY, Texas -

The Houston area housing market is still booming and shows no signs of slowing down.

According to a study done by a group called Welcomemat Services, a zip code in Katy was the hottest zip code in the United States during the month of May. Nearly 600 families are reported to have either moved into a home or an apartment in Katy during May.

The Houston Association of Realtors says don't expect a slow down any time soon.

"The 99 corridor, the I-10 corridor heading out towards the Energy Corridor really is where we are seeing a lot of growth, new construction. Katy has always been a strong market, it's really our base for our energy corridor in the Houston area," said Chaille Ralph, chair of the HAR board.

Second to Katy was a zip code in Charlotte and third was one in Chicago.

Here are the top 20 fastest growing zip codes in the nation by household move-ins from May 4-31, according to marketing strategy and technology company Welcomemat Services.

City      State    ZIP  Household Move-ins
Katy        TX    77494    596
Charlotte    NC    28277    594
Chicago    IL    60657    576
Virginia Beach    VA    23462    560
Mckinney    TX    75070    530
Charlotte    NC    28269    511.2
Clarksville    TN    37042    485
Chicago        IL    60614    484
Beaverton    OR    97006    484
Smyrna        GA    30080    479
Katy        TX    77449    476
Chicago        IL    60618    475
San Diego    CA    92109    473
Chicago        IL    60647    469
Bend        OR    97701    468
Temecula    CA    92592    464
Antioch        TN    37013    458
Orlando        FL    32828    456
North Las Vegas    NV    89031    448
Huntersville    NC    28078    445