D
- Daby's Ferry, California – S. Daby (ferry operator)
- Dacono, Colorado – Daisy Baum, Cora Van Vorhies and Nona (or Nora) Brooks (local residents)
- Dade City, Florida – Major Francis L. Dade
- Daisetta, Texas – Daisy Barrett and Etta White (early residents)
- Dallas, Texas – George M. Dallas
- Dalton, Massachusetts and Dalton, New Hampshire – Tristram Dalton (Speaker of the Massachusetts House of Representatives)
- Danforth, Maine – Thomas Danforth (proprietor)
- Danvers, Massachusetts – Danvers Osborn family
- Danville, California – Daniel Inman (local landowner)
- Danville, Georgia – Daniel G. Hughes (father of U.S. Representative Dudley Mays Hughes)
- Danville, Vermont – Jean-Baptiste Bourguignon d'Anville
- Darrah, California – Richard Darrah (first postmaster)
- Darwin, California – Dr. Darwin French
- Daulton, California – Henry C. Daulton (landowner and politician)
- Davenport, Iowa – Colonel George Davenport
- Davie, Florida – Randolph P. Davie (developer)
- Davis, California – Jerome C. Davis (local farmer)
- Dawson, Illinois – John Dawson (member of "The Long Nine", a group of legislators from Sangamon County)
- Dayton, Maine – Thomas Day (submitted the petition for Dayton to separate from Hollis)
- Dayton, Ohio – Jonathan Dayton
- Dayton, Texas – I. C. Day (landowner) (combination of Day's Town)
- Daytona Beach, Florida – Matthias Day
- Dearborn, Michigan and Dearborn, Missouri – Henry Dearborn (Revolutionary War general and Secretary of War)
- Deblois, Maine – T.A. Deblois (president of the Bank of Portland)
- Decatur, Illinois – Stephen Decatur (War of 1812 naval hero)
- Decatur, Nebraska – Stephen Decatur (one of the village's incorporators)
- Decoto, California – Ezra Decoto (landowner)
- Deering, New Hampshire – Frances Deering Wentworth (the maiden name of Governor John Wentworth's wife)
- DeHaven, California – John J. De Haven
- DeLand, Florida – Henry Addison DeLand (founder, also founded Stetson University)
- Delano, California – Columbus Delano
- Delavan, Wisconsin – Edward C. Delevan (temperance leader in Albany, New York)
- Denning, New York – William Denning (land purchaser)
- Dennis, Massachusetts – Josiah Dennis (resident minister)
- Denver, Colorado – James W. Denver
- DeSabla, California – Eugene De Sabla (engineer)
- DeSoto County, Florida – Hernando de Soto
- Devens, Massachusetts – Charles Devens (Civil War general and jurist)
- Deweyville, Texas – Admiral George Dewey (victorious in the Battle of Manila Bay)
- DeWitt, New York – Major Moses DeWitt (judge and soldier)
- Dexter, Maine – Samuel Dexter (early statesman)
- Dexter, Minnesota – Dexter Parrity (early settler)
- Di Giorgio, California – Joseph Di Giorgio (agricultural entrepreneur)
- Diamondville, California – James Diamond
- Dickenson, California – William Legrand Dickinson
- Dighton, Massachusetts – Frances Dighton Williams (wife of Richard Williams, a town elder)
- Dillon Beach, California – George Dillon (founder)
- Dimond, California – Hugh Dimond (Gold Rush miner and landowner)
- Dixfield, Maine – Dr. Elijah Dix (landowner)
- Dixmont, Maine – Dr. Elijah Dix (landowner)
- Dixon, California – Thomas Dickson (donor of land for a railroad depot) (error in the address of the first rail shipment to here stuck)
- Dixville, New Hampshire – Timothy Dix, Jr. (grantee)
- Dobbins, California – William M. and Mark D. Dobbins (early settlers)
- Donner, California – Donner Party (ill-fated emigrant group)
- Dougherty, California – James Witt Dougherty (founder)
- Douglas, Massachusetts – Dr. William Douglas (Boston physician)
- Douglas, Wyoming – Stephen A. Douglas
- Douglas Flat, California – Tom Douglas (early merchant)
- Dover-Foxcroft, Maine – Joseph E. Foxcroft (proprietor)
- Downers Grove, Illinois – Pierce Downer (settler)
- Downey, California – John G. Downey
- Doyle, Lassen County, California – Oscar Doyle (landowner)
- Drakesbad, California – Edward R. Drake (settler & lodge owner)
- Dresbach Township, Minnesota – George B. Dresbach (founder)
- Duanesburg, New York – James Duane (grantee)
- Dubuque, Iowa – Julien Dubuque (early resident)
- Dudley, Georgia – Dudley Mays Hughes (U.S. Representative)
- Dudley, Massachusetts – Paul and William Dudley (landowners)
- Duluth, Minnesota – Daniel Greysolon, Sieur du Lhut
- Dummer, New Hampshire – William Dummer (Massachusetts Governor)
- Dummerston, Vermont – William Dummer
- Dunlap, California – George Dunlap Moss (teacher)
- Dunnigan, California – A. W. Dunnigan (early settler)
- Durham, California – W.W. Durham (member of the California State Assembly)
- Durham, North Carolina – Bartlett S. Durham
- Duval County, Florida – William Pope DuVal, Governor of Florida Territory from 1822 to 1834
Read more about this topic: List Of American Places Named After People