### Question
How does the law define frontier county?


### Answer
Under *42 U.S.C. § 1395ww*, **frontier county** is defined as:

> a county in which the population per square mile is less than 6

#### Citation:
  - *42 U.S.C. § 1395ww*
  - Heading: **CHAPTER 7-SOCIAL SECURITY > SUBCHAPTER XVIII-HEALTH INSURANCE FOR AGED AND DISABLED > Part E-Miscellaneous Provisions**

