| POLK ELECTRICAL CONTRACTORS ASSOCIATION, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | May 3, 1977 | Inactive |
| FIRST BAPTIST CHURCH OF WAHNETA, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jun 23, 1977 | Inactive |
| THE GOOD NEWS BAPTIST CHURCH, INC. OF WINTER HAVEN, FLORIDAWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Sep 8, 1977 | Inactive |
| CYPRESS GARDENS CHRISTIAN REFORMED CHURCH, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Oct 11, 1977 | Inactive |
| STILLS & REELS CAMERA CLUB, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Nov 23, 1977 | Inactive |
| POLK COUNTY FLYERS, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Nov 30, 1977 | Inactive |
| FLORIDA CITRUS SHOWCASE AND POLK COUNTY FAIR, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jan 13, 1978 | Inactive |
| SINGLETONS OF WINTER HAVEN, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Feb 22, 1978 | Inactive |
| WAHNETA COMMUNITY LEAGUE, INC.Wahneta, FL · Inactive | Wahneta, FL | Nonprofit | Mar 24, 1978 | Inactive |
| DARRELL GLENN EVANGELISTIC ASSOCIATION, INCORPORATEDLocation not reported, FL · Inactive | Location not reported, FL | Nonprofit | Mar 28, 1978 | Inactive |
| ST. MARY'S ANGLICAN CHURCH OF WINTER HAVEN, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Apr 3, 1978 | Active |
| POLKATS HOBIE CAT FLEET 116, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Apr 5, 1978 | Inactive |
| WINTER HAVEN YOUTH SOCCER ASSOCIATION, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Apr 6, 1978 | Active |
| JAN-PHYL VOLUNTEER FIRE DEPARTMENT, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | May 18, 1978 | Inactive |
| GERICARE, INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | May 24, 1978 | Inactive |
| CYPRESS FLYERS, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jun 13, 1978 | Inactive |
| POLK EXPERIMENTERS GROUP AMATEUR RADIO CLUB, INCORPORATEDWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jun 27, 1978 | Inactive |
| UNITY TABERNACLE CHURCH OF GOD, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Dec 12, 1978 | Inactive |
| WINTER HAVEN YOUTH BASKETBALL, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Dec 15, 1978 | Inactive |
| WORLD OCEANOGRAPHIC RESEARCH CORPORATIONWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Dec 21, 1978 | Inactive |
| WINTER HAVEN OPTIMIST CLUB, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Jan 16, 1979 | Active |
| POLK COUNTY SHERIFF'S EMPLOYEE'S ASSOCIATION, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jan 25, 1979 | Inactive |
| MERCEDES BENZ CLUB OF AMERICA, INC., LAKE RIDGE SECTIONWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Apr 19, 1979 | Inactive |
| THE GREENFIELD VILLAGE OF CYPRESSWOOD HOMEOWNERS' ASSOCIATION, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | May 4, 1979 | Active |
| FIRST CHURCH OF THE NAZARENE OF WINTER HAVEN, FLORIDA, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | May 17, 1979 | Active |
| HEARTLAND MICROGRAPHIC SERVICES, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jun 6, 1979 | Inactive |
| THE CRIMINAL JUSTICE TASK FORCE, POLK COUNTY, FLORIDA, INCORPORATEDWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jun 29, 1979 | Inactive |
| INWOOD PROPERTY OWNERS ASSOCIATION, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Aug 7, 1979 | Inactive |
| THE VILLA ATHLETIC CLUB, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Aug 30, 1979 | Inactive |
| IMPERIAL VILLAS HOMEOWNERS' ASSOCIATION, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Sep 4, 1979 | Active |
| STONEBRIDGE PATIO HOMES HOMEOWNER'S ASSOCIATION,INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Dec 4, 1979 | Active |
| WINTER HAVEN CULTURAL ARTS BOOSTERS COMPANY, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Dec 31, 1979 | Inactive |
| LAKE JESSIE AREA RESIDENTS ASSOCIATION, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Jan 23, 1980 | Inactive |
| EDGEWATER MANOR HOMEOWNER'S ASSOCIATIONWinter Haven, FL · Active | Winter Haven, FL | Nonprofit | Jan 23, 1980 | Active |
| CHRISTIAN HERITAGE BAPTIST CHURCH, INCWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Feb 20, 1980 | Inactive |
| WINTER HAVEN NAZARENE TOWERS, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Mar 17, 1980 | Inactive |
| ALAFIA RIVER GRANGE NO. 210 INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Apr 21, 1980 | Inactive |
| NEW LIFE ASSEMBLY OF GOD OF SOUTH WINTER HAVEN, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Apr 22, 1980 | Active |
| AGRICO SPORTSMEN CLUB, INC.Wahneta, FL · Inactive | Wahneta, FL | Nonprofit | May 14, 1980 | Inactive |
| FLORIDA COMPETITION SOARING, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | May 23, 1980 | Inactive |
| THE ASSEMBLIES OF THE LORD JESUS CHRIST OF WINTER HAVEN, FLORIDA, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | May 27, 1980 | Inactive |
| STONEBRIDGE PATIO HOMEOWNER'S ASSOCIATION, PHASEII, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | May 27, 1980 | Active |
| WINTER HAVEN AREA SOFTBALL ASSOCIATION, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | May 28, 1980 | Inactive |
| THE HOPE SINGERS, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Aug 13, 1980 | Inactive |
| HARTRIDGE HARBOR OWNERS' ASSOCIATION INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Sep 16, 1980 | Active |
| MINORITY CONTRACTORS TECHNICAL SERVICES, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Sep 23, 1980 | Inactive |
| THERMAL SOARING OF WINTER HAVEN, INCORPORATEDWinter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Dec 2, 1980 | Inactive |
| THE JUNIOR LEAGUE OF GREATER WINTER HAVEN, FLORIDA, INC.Winter Haven, FL · Active | Winter Haven, FL | Nonprofit | Dec 31, 1980 | Active |
| C-E APARTMENTS OF LAKELAND, INC.Winter Haven, FL · Inactive | Winter Haven, FL | Nonprofit | Feb 27, 1981 | Inactive |
| POLK COUNTY CONTROLLED LAW ENFORCEMENT OFFICERS ORGANIZATION, INCORPORATEDLocation not reported, FL · Inactive | Location not reported, FL | Nonprofit | Mar 16, 1981 | Inactive |