Meetup is an online place where one can find community. Not sure how well it is used in rural areas. Look for and or post at the library bulletin board. Nextdoor is a way to find/create community; again, not sure how great it is for more rural areas. As has been mentioned churches (bulletin boards) can be a place to find groups for engagement. In my quite rural area bunko and pinochle are played by small groups (4, 8, 12) on a regular basis and these groups are a good start at meeting people. Find like minded folk by helping out with your local fair committee/board, and or the 4H and Future Farmers, volunteering at the library.