- Cushman and Wakefield, Inc.52
- DBS Associates3
- Dahage Realty Corp.11
- Dahill Gardens, Inc.1
- David Isacowitz and Sons1
- David Kenneth Specter and Associates1
- Davis, Brody and Associates5
- De Pace and Juster9
- De Rose and Cavalieri1
- Decatur Estates1
- Decatur Towers, Inc.1
- Deegan Building Corp.1
- Denberg, Louis1
- Denihon, B.J.13
- Denrich Realty Corp.2
- Der Scutt Architects1
- Derlow Estates, Inc.2
- Derson Realty Corp.1
- Desposito, A.1
- Detin Building Corp.1
- Development Services, Inc.1
- Di Fiore and Giacobbe2
- Di Vincenzo, Tito7
- Diamond, Arthur3
- Diamond, Sidney3
- Diane Gardens, Inc.1
- Digby Apartments, Inc.1
- Digby Management Co.1
- Dillerwood Realty Co., Inc.2
- Dinemoss Building Co., Inc.1
- Diplomat Co.1
- Diplomat Estates1
- Distillator, Abner1
- Distinctive Properties, Inc.3
- Ditmas Building Co., Inc.1
- Dominick Salvati and Son4
- Donald W. Brown, Inc.4
- Dorfman and Rogow2
- Dorfman, Boris W.4
- Dorfman, George1
- Doro Building Corp.1
- Dorrell Building Corp.1
- Double A Realty Corp.1
- Douglas Elliman-Gibbons and Ives, Inc.7
- Douglas Gibbons and Co., Inc.8
- Douglas Gibbons-Hollyday and Ives, Inc.41
- Douglas L. Elliman and Co., Inc.291
- Douglas, Gibbons and Co., Inc.2
- Douglass, Lathrop2
- Dowling, William M.12
- Downe, H. Russell, Jr.1
- Draper, George, Mrs.1
- Drucker Associates1
- Drucker, Charles1
- Drucker, Harry1
- Dubin, Myron1
- Duff V. Conger, Inc.1
- Durand Taylor Co., Inc.2
- Dwelling Managers, Inc.26
- Dwight P. Robinson and Co., Inc.1