If you live near a military base or post, approach military personnel about volunteering a little of their time to umpire some games for your league. Military personnel are always looking for community involvement activities to list on their fitness reports or on their annual evaluations.
Contact other associations, such as fire departments, search and rescues, etc. Those type of community based organizations can and sometimes will be able to put you in contact with some volunteers who are willing to umpire.
Create a code of conduct for all players, managers, coaches and fans that will remove some pressures from the volunteer umpires. Have parents, manages, coaches and players sign the code of conduct
When umpire meetings are scheduled, ask all those who plan to attend to bring someone along with them, especially a manager/coach.
A league may chose to use manages and or coaches to umpire in divisions in which they do not manager or coach. If the local league chooses to use managers/coaches, they should umpire with a qualified umpire.
Each team should recruit one or two parents to umpire.
Many local newspapers will offer public service advertisements to youth groups. Many radio stations and TV stations have avenues for public announcements for non-profit organizations. The local leagues should contact these venues and advertise the need for volunteer umpires, clinic dates, etc.
During the local league registration periods, volunteer forms are used to ask parents and others what they would volunteer to do to help the league. Make sure the UIC or board member personally ask those who volunteer to umpire and get a possible commitment from that individual. The UIC should attend these registration periods in uniform whenever possible and try to put together a CALL list from the volunteers that attend.
Many high schools around the country require their students to perform some type of community service before they are allowed to graduate. Get the UIC or board member to the high school and interact with the guidance counselors to get names of those who may be willing to help with umpiring.
Use basketball, football or other sport officials. While attending a game at a high school event or another sport event contact the officials after the game and ask them if they would be willing to give to the Little League program one or two nights a week.