24x36. Porterville is a city in the San Joaquin Valley, in Tulare County, California, United States. Porterville Transit System Map . View businesses, restaurants, and shopping in . 500 West Vandalia Ave Porterville, CA 93257 Store #2278 Main: (559) 306-5000 Fax: (559) 306-5003 Pro Desk: (559) 306-5028 Pro Email: Pro2278@lowes.com HOURS On 7/21/1952 at 11:52:14, a magnitude 7.7 (7.7 UK, Class: Major, Intensity: VIII - XII) earthquake occurred 73.9 miles away from Porterville … Feel free to download the PDF version of the Porterville, CA map so that you can easily access it while you travel without any means to the Internet.