San Antonio has come a long way in our struggle to reduce the numbers of homeless animals, but there is still much to do. You can help by having all your companion animals spayed (if female) or neutered (if male). In addition to lowering the population of homeless and unloved animals, the other advantages described in the graphic above include reduced roaming and increased lifespan.

Your veterinarian can perform the surgery or you can look to one of several Spay/Neuter clinics in San Antonio, most of which require appointments. If you live in one of the listed zip codes, you may also qualify for free surgery, while funding is available. For a list of area clinics and qualifying zip codes for free surgery visit San Antonio Animal Care Services.


The following zip codes are currently eligible for free spay/neuter services. If you live outside of the city limits or in an unlisted zip code, you can still contact the clinics for low-cost services.


  • 78201
  • 78202
  • 78203
  • 78204
  • 78207
  • 78208
  • 78210
  • 78211
  • 78213
  • 78214
  • 78218
  • 78219
  • 78220
  • 78221
  • 78222
  • 78223
  • 78224
  • 78225
  • 78226
  • 78227
  • 78228
  • 78229
  • 78235
  • 78237
  • 78238
  • 78242
Proof of Residency

Most clinics in the city will need you to show them an ID or a bill with your address. Before you take your pet to the clinic, check with them about what you need to prove where you live.

It costs $350/month to display this Spay/Neuter street banner. It is currently on S Zarzamora at Guadalupe, moving to MLK Blvd at S Mittman through the end of May. Help us educate San Antonians about free and low-cost sterilization services. Be part of the solution....Donate to keep this banner flying where it's needed most.