| Name | Address, Zip |
| All Aboard Animal Search And Rescue | 20461 Big Canyon Rd, 95461-7711 |
| Middletown Aces | 17113 Butts Canyon Rd, 95461-9602 |
| Divine Avataric Holy Institution Of Global Adidam Ruchiradam Southwest | 12312 State Highway 175, 95461-9715 |
| The Divine Avataric Holy Domains Of Adidam Ruchiradam | 12040 Seigler Springs North Rd, 95461-9746 |
| Middletown Adventist School | Po Box 1664, 95461-1664 |
| Home Again | 18795 Hwy 29 Ste 29, 95461-9779 |
| New Age Church Of Being | 18424 Harbin Springs Road, 95461 |
| Ministerois Rios De Agua Viva Lake County Inc | 20800 Hwy 29, 95461 |
| Anderson Springs Community Alliance | Po Box 884, 95461-0884 |
| Friends Of The I Am | Po Box 82, 95461-0082 |
| Road Runners Club Of America | Po Box 490, 95461-0490 |
| Parents And Community For Kids Inc | Po Box 1648, 95461-1648 |
| Worldwide Aquatic Bodywork Association | Po Box 1817, 95461-1817 |
| Architecture For Humanity | Po Box 158, 95461-0158 |
| General Council Of The Assemblies Of God | 18160 Spruce Rd Ext, 95467 |
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| Bear Ridge Employees Assoc | Po Box 663, 95461-0663 |
| California High School Rodeo Association Inc | Po Box 1123, 95461-1123 |
| South Lake County Historical Association | 21267 Calistoga Street, 95461 |
| Middletown Central Park Association | Po Box 383, 95461-0383 |
| Seigler Springs Community Redevelopment Association | 12312 Highway 175, 95461-9715 |
| California Teachers Association | Po Box 577, 95461-0577 |
| Middletown Rodeo Association | 18585 Guenoc Ln, 95461-9778 |
| South Lake County Firefighters Association Inc | Po Box 1360, 95461-1360 |
| Middletown Cobb Merchants Association | Po Box 872, 95461-0872 |
| Awakening The Diamond Mind Foundation | Po Box 1721, 95461-1721 |
| Middletown Bocce Ball League | Po Box 1753, 95461-1753 |
| Little League Baseball Inc | Po Box 1024, 95461-1024 |
| Middletown Cobb Youth Basketball League | Po Box 270, 95461-0270 |
| Middletown Bible Church | 20853 State Highway 29, 95461 |
| Bill Jordan Project | Po Box 100, 95461-0100 |
| Minnie Cannon Booster Club | 20932 Big Canyon Rd, 95461-7721 |
| Middletown Sports Boosters Club | Po Box 56, 95461-0056 |
| Hope Health Of Northern California | Po Box 1818, 95461-1818 |
| Calistoga Institute | 12070 Shenandoah Rd, 95461-9740 |
| Cats Of Sunday Street Inc | 21373 State Hwy 175 Unit D 12, 95461-7605 |
| Lake County International Charter School | 15850 Armstrong Street, 95461 |
| Jesus Christ Fellowship | 21443 Pine Street, 95461 |
| Hidden Valley Community Church | Po Box 1049, 95461-1049 |
| Support For Heart Consciousness Church | 18424 Harbin Springs Rd, 95461-9687 |
| Heart Consciousness Church Inc | Po Box 82, 95461-0082 |
| Middletown Senior Citizens Inc | Po Box 1037, 95461-1037 |
| Clair Sentian Foundation Inc | Po Box 235, 95461-0235 |
| Clearlake Youth Soccer League | Po Box 721, 95461-0721 |
| Middletown Wrestling Club | Po Box 1835, 95461-1835 |
| Middletown Lions Club | 15399 Central Park Rd, 95461-9514 |
| Middletown Luncheon Club | Po Box 74, 95461-0074 |
| Middletown-cobb Girls Softball | Po Box 446, 95461-0446 |
| Lake County Community Foundation Inc | Po Box 414, 95461-0414 |
| Middletown Composite Mtb Inc | Po Box 59, 95461-0059 |
| Southlake Fire Safe Council | Po Box 1773, 95461-1773 |
| Ecoarts Of Lake County | Po Box 1616, 95461-1616 |
| Coyote Valley Parent Teacher Organization | Po Box 1743, 95461-1743 |
| Upper Putah Creek Stewardship | Po Box 27, 95461-0027 |
| Wild Neighbors Database Project | Po Box 421, 95461-0421 |
| Schieber Family Foundation | 12515 Ridge Rd, 95461-9554 |
| Independent Order Of Odd Fellows | Po Box 332, 95461-0332 |
| Middletown Youth Football Inc | Po Box 172, 95461-0172 |
| Hammers For Hope | Po Box 1612, 95461-1612 |
| Solutions For Today | Po Box 782, 95461-0782 |
| Four Springs Seminars | 14598 Sheveland Rd, 95461-9752 |
| Friends Of Middletown Library | Po Box 57, 95461-0057 |
| Middletown High School Sober Graduation | 20932 Big Canyon Rd, 95461-7721 |
| Rhize Health | 18935 Ford Flat Rd, 95461-7614 |
| Hidden Valley Rescue Inc | Po Box 1780, 95461-1780 |
| Holy Lands Preservation Trust | Po Box 782, 95461-0782 |
| Rotary International | Po Box 981, 95461-0981 |
| Middletown Middle School Parent Teacher Student Organization | 20932 Big Canyon Rd, 95461-7721 |
| Owen Ranch | 18585 Guenoc Ln, 95461-9778 |
| Sacred Support Services | 11987 Loch Lomond Rd, 95461-9542 |
| Trained Up | Po Box 845, 95461-0845 |
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