1. Undergraduate Education (Bachelor's Degree): You'll need a bachelor's degree from any accredited college or university. There's no specific major required, although pre-med tracks are common. Popular majors include biology, chemistry, psychology, and others related to the sciences.
2. Medical School (MD or DO): After completing your bachelor's degree and meeting the prerequisites (which include specific science courses), you apply to medical school. Medical schools granting either an MD (Doctor of Medicine) or a DO (Doctor of Osteopathic Medicine) are the institutions that provide the core medical training. Many medical schools exist across the US and internationally. Examples include Harvard Medical School, Johns Hopkins University School of Medicine, and many others (a simple online search will yield a comprehensive list).
3. Residency in Family Medicine: Upon graduating medical school, you'll need to complete a residency program specializing in Family Medicine. These residencies are offered at hospitals and affiliated medical centers associated with many medical schools and other teaching institutions. The residency is where you gain the practical experience and specific training required to become a family practice physician. Again, many hospitals offer family medicine residencies.
Therefore, to answer your question directly: you don't choose a "college for family practice doctors," but rather a college for an undergraduate degree, followed by a medical school granting an MD or DO, and finally a family medicine residency program at a hospital or affiliated teaching center. All of these institutions are involved in the process.