Fun Facts and Stats About Names Dog names, cat names, and humans too: Facts and Stats about the Dog name Rex from 19K+ adoptable Dogs across the U.S. that need homes Now! data last updated: 11/13/25 - Dig In Most adoptable Dogs with the the name rex live in the state of Texas and California. 25.0% live in Texas and California, 16.7% live in Florida If you want to stand out take your Dog to New Hampshire (None live there). The majority of Dogs with the name Rex are in the other group Is Rex generally a male or female name? ♀♀♀♀♀ ♂ Rex is unquestionably a male Dog name. 99.99% of all Rex in the USA are male while merely 0.01% are female. FEMALEMALE If you're a Dog and your name is Rex you are most likelyA 10.0% are American Bulldog 10.0% are Pit Bull Terrier 10.0% are Shepherd 10.0% are Labrador Retriever Rex is a quite popular Dog name. Rex is currently the 65th most popular Dog name in the USA. it reached its peak popularity as the 34th most common Dog name in Oct. In the past few months, the name has become more trendy again. Interesting fact: Nevada is the state with the highest per capita adoptable Dogs named rex Check out the per capita popularity of Dogs named rex for each state in the map below. Is the Dog name rex only for Dogs? Nope The first name rex is a human name & There is also a Cat named rex Did you enjoy this page? Share it! Facebook Twitter Tumblr Reddit And check out more names: Caleb Oakley Baxter Moose