1850 Atlas
| Name | What | Place | Pop | Other |
| Xenia | PT, CH | Greene Co, OH | 7,055 | seat of justice, water by Little Miami river, Caesar's & Shawnee creeks |
| Xenia | PO | Clay Co, IL | ||
| Yancey's Mills | PO | Albemarle Co, VA | ||
| Yanceyville | PV, CH | Caswell Co, NC | seat of justice | |
| Yanhanna | PO | Georgetown dist, SC | ||
| Yankee Hill | PO | Menard Co, IL | ||
| Yankee Settlement | PO | Delaware Co, IA | ||
| Yankee Spring | PT | Barry Co, MI | 292 | |
| Yaphank | PO | Suffolk Co, Long Island, NY | ||
| Yarborough | PO | Bossier parish, LA | ||
| Yardleyville | PV | Makefield twp, Bucks Co, PA | water by Delaware river | |
| Yardville | PO | Mercer Co, NJ | ||
| Yarmouth | PT | Barnstable Co, MA | 2,595 | water by Cape Cod bay & Atlantic ocean |
| Yarmouth | PV | Yarmouth twp, Barnstable Co, MA | water by an arm of Cape Cod bay | |
| Yarmouth Port | PT | Orleans Co, NY | 2,242 | water by Johnson's creek & Lake Ontario |
| Yates | PO | Potter twp, Yates Co, NY | ||
| Yatesville | PO | Lunenburgh Co, VA | ||
| Yatesville | PO | Washington Co, IA | ||
| Yazoo City | PV | Yazoo Co, MS | water by Yazoo river | |
| Yellow Branch | PO | Campbell Co, VA | ||
| Yellow Bud | PO | Ross Co, OH | ||
| Yellow Bush | PO | Chickasaw Co, MS | ||
| Yellow Creek | PO | Lumpkin Co, GA | ||
| Yellow Creek | PO | Tishomingo Co, FL | ||
| Yellow Creek | PO | Knox Co, KY | ||
| Yellow Creek | PT | Columbiana Co, OH | 854 | |
| Yellow Creek | PO | Stephenson Co, IL | ||
| Yellow Creek | PT | Charlton Co, MO | ||
| Yellow Creek | T | Linn Co, MO | ||
| Yellow Creek Furnace | PO | Montgomery Co, TN | ||
| Yellow Mountain | PO | Yancey Co, NC | ||
| Yellow Head Grove | PO | Will Co, IL | ||
| Yellow River | PO | Gwinnett Co, GA | ||
| Yellow River | PO | Marshall Co, IN | ||
| Yellow Spring | PO | Blair Co, PA | ||
| Yellow Spring | PO | Hampshire Co, VA | ||
| Yellow Spring | PO | Johnson Co, IN | ||
| Yellow Spring | PO | Des Moines Co, IA | ||
| Yellow Springs | PO | Claiborne Co, TN | ||
| Yellow Springs | PV | Miami twp, Greene Co, OH | ||
| Yellow Stone | PO | Paulding Co, GA | ||
| Yellow Stone | PO | Lafayette Co, WI | ||
| Yellow Store | PO | Hawkins Co, TN | ||
| Yellville | PV, CH | Marion Co, AR | seat of justice, water by tributary of White river | |
| Yelvington | PV | Daviess Co, KY | ||
| Ynooski | PO | Kalamazoo Co, MI | ||
| Yocony | PO | Itawamba Co, MS | ||
| Yocumtown | PV | York Co, PA | ||
| Yocum Station | PO | Lee Co, VA | ||
| Yohogany | PO | Westmoreland Co, PA | ||
| Yonguesville | PV | Fairfield dist, SC | water by Little river | |
| Yonkers | PT | Westchester Co, NY | 1,460 | water by Bronx, Saw Mill & Hudson rivers (formerly Phillipsburgh) |
| York | PT, CH | York Co, ME | 2,980 | seat of justice, water by York & Cape Neddock rivers |
| York | PT | Livingston Co, NY | 2,785 | water by tributaries of Genesee river |
| York | PT | York Co, PA | 1,960 | |
| York | PB, CH | York Co, PA | 134 | seat of justice, water by Codorus creek |
| York | PV | Fayette Co, GA | ||
| York | PT | Athens Co, OH | 1,391 | water by Hockhocking river |
| York | T | Belmont Co, OH | 1,312 | water by Ohio river |
| York | T | Darke Co, OH | 499 | |
| York | T | Lucas Co, OH | ||
| York | T | Medina Co, OH | 1,211 | |
| York | T | Morgan Co, OH | 1,207 | |
| York | T | Sandusky Co, OH | 1,811 | |
| York | T | Tuscarawas Co, OH | 1,303 | |
| York | T | Union Co, OH | 831 | |
| York | T | Van Wert Co, OH | 375 | |
| York | PT | Washtenaw Co, MI | 1,360 | |
| York | PT | Switzerland Co, IN | 1,523 | |
| York | T | Steuben Co, IN | ||
| York | T | Noble Co, IN | 565 | |
| York | PO | Gibson Co, IN | ||
| York | PV | Crawford Co, IL | water by Wabash river | |
| York | PO | Walker Co, AL | ||
| York | PO | Dane Co, WI | ||
| York Centre | PO | Du Page Co, IL | ||
| York Haven | V | Newberry twp, York Co, PA | 131 | water by Susquehanna river |
| York North Ridge | PO | Sandusky Co, OH | ||
| York South Ridge | PO | Sandusky Co, OH | ||
| York Sulphur Springs | PV | Latimore twp, Adams Co, PA | ||
| Yorkshire | PT | Cattaraugus Co, NY | 2,010 | water by Cattaraugus creek |
| Yorktown | PT | Westchester Co, NY | 2,273 | |
| Yorktown | PV, CH | York Co, VA | seat of justice, water by York river | |
| Yorktown | PV | Delaware Co, IN | ||
| Yorktown | PO | Bureau Co, IL | ||
| Yorktown | PO | De Witt Co, TX | ||
| Yorkville | PV | city and county of New York | site of the receiving reservoir of the Croton water works | |
| Yorkville | PV, CH | York dist, SC | 983 | seat of justice, water by tributary of Broad river |
| Yorkville | PV | Pickens Co, AL | ||
| Yorkville | PV | Racine Co, WI | ||
| Yorkville | PV | Gibson Co, TN | water by tributary of Obion river | |
| Yorkville | PO | Dearborn Co, IN | ||
| Yorkville | PO | Kalamazoo Co, MI | ||
| Yough Glades | PO | Alleghany Co, MD | ||
| Young | PT | Indiana Co, PA | 1,513 | |
| Young | PT | Jefferson Co, PA | ||
| Young | PO | McDonough Co, IL | ||
| Young Cane | PO | Union Co, GA | ||
| Young Hickory | PO | Will Co, IL | ||
| Young Hickory | PO | Muskingum Co, OH | ||
| Young Hickory | PO | Washington Co, WI | ||
| Young Womanstown | PV | Clinton Co, PA | water by Susquehanna river | |
| Youngers | PO | Boone Co, ME | ||
| Young's Cross Roads | PO | Granville Co, NC | ||
| Young's Point | PO | Madison parish, LA | ||
| Young's Settlement | PO | Bastrop Co, TX | ||
| Young's Store | PO | Laurens dist, SC | ||
| Youngtown | PV | Porter twp, Niagara Co, NY | water by Niagara river | |
| Youngstown | PB | Unity twp, Westmoreland Co, PA | ||
| Youngstown | PT | Mahoning Co, OH | 2,802 | water by Mahoning river |
| Youngsville | PV | Warren Co, PA | water by Big Broken Straw creek | |
| Youngsville | PO | Sullivan Co, NY | ||
| Youngsville | PV | Tallapoosa Co, AL | ||
| Youngsville | PO | Adams Co, OH | ||
| Yountsville | PO | Montgomery Co, IN | ||
| Ypsilanti | PT | Washtenaw Co, MI | 3,051 | water by Huron river & Stony creek |
| Yuba City | PO | Yuba Co, CA | ||
| Zabriski | PO | De Witt Co, IL | ||
| Zachary | PO | Marshall Co, AL | ||
| Zackville | PO | Wirt Co, VA | ||
| Zane | PT | Logan Co, OH | 1,090 | |
| Zanesville | PV | Logan Co, OH | water by head waters of Mad river | |
| Zanesville | PT, CH | Muskingum Co, OH | 7,929 | water by Muskingum river |
| Zanesville | PV | Montgomery Co, IL | ||
| Zavalla | PO | Jasper Co, TX | ||
| Zebulon | PV, CH | Pike Co, GA | seat of justice | |
| Zebulon | V, CH | Pike Co, AR | seat of justice, water by tributary of Washita river | |
| Zelienople | PV | Conequenessing twp, Butler Co, PA | 385 | water by Conequenessing creek |
| Zenas | PV | Jennings Co, IN | ||
| Zeno | PO | York dist, SC | ||
| Zilwaukie | PO | Saganaw Co, MI | ||
| Zimmerman | PO | Greene Co, OH | ||
| Zion | PV | Irdell Co, NC | ||
| Zion | PO | Centre Co, PA | ||
| Zion | PO | Cecil Co, MD | ||
| Zion | PO | Grant Co, IN | ||
| Zion Hill | PO | Hamilton Co, TN | ||
| Zion Hill | PO | Amitie Co, MS | ||
| Zion Seminary | PV | Covington Co, MS | ||
| Zionsville | PO | Lehigh Co, PA | ||
| Zoar | PO | Eden twp, Erie Co, NY | ||
| Zoar | PV | Lawrence twp, Tuscarawas Co, OH | water by Tuscarawas river | |
| Zoar Bridge | PV | New Haven Co, CT | ||
| Zollersville | PO | Washington Co, PA |