Allendale, Solano County, California

Hartley is a census-designated place (CDP) in Solano County, California. Hartley sits at an elevation of 131 feet (40 m). The 2010 United States census reported Hartley's population was 2,510.

Kaiser Vacaville Medical Center is a Kaiser Permanente hospital in Vacaville, California, serving Solano County.

Scandia is an area of Solano County, California. It means “Little Norway,” and refers to the Scandinavian pioneers who settled the area southeast of present-day Fairfield, California.

Wolfskill Grant Orchards is historical site built in 1842 in Winters, California in Solano County, California. The Wolfskill Grantis a California Historical Landmark No. 804 listed on June 28, 1965. Horticulturist John R. Wolfskill (1804-1897) settled on land of the Rancho Rio de los Putos a First Mexican Republic California Land Grant near the present-day City of Winters in 1842 after marriage to Magdalena Lugo. Wolfskill, also called John Reed, brought with him seeds and plant cuttings and started new horticulture fruit industry in Northern California. Wolfskill came west on the Santa Fe Trail. Wolfskill worked at teamster in Santa Fe, New Mexico before coming west. John Reid Wolfskill was born on 11 September 1804, in Madison, Kentucky. Wolfskill married Susan Cooper on January 10, 1860, in Colusa, California. Wolfskill died on May 27, 1897, in Yolo, California at the age of 92. In 1938, Wolfskill daughter, Mrs. Frances Wolfskill Taylor Wilson donated 107.28 acres of Wolfskill plant nursery and orchard University of California. University of California opened the University of California Experimental Farm on the University of California, Davis land part of the UC Davis Plant Sciences Department. A historical marker is at University of California Experimental Farm. The marker was placed there by California State Park Commission, the Solano County Historical Society in 1966.Uncle Burt's Tree is marker nearby placed by Vacaville Historical Marker Committee in 2002.

The 1892 Vacaville–Winters earthquakes occurred in northern California as a large doublet on April 19 and April 21. Measured on a seismic scale that is based on an isoseismal map or the event's felt area, the 6.4 Mla and 6.2 Mla  events were assigned a maximum Mercalli intensity of IX (Violent), and affected the North Bay and Central Valley areas. The total damage was estimated to be between $225,000 and 250,000 and one person was killed. No evidence of fault movement on the surface of the ground was observed as a result of either of the strong shocks. Both occurred in the domain of the San Andreas strike-slip system of faults, but their focal mechanism is uncertain.

Rancho Rio de los Putos, (Wolfskill Grant) was a 17,755-acre (71.85 km2) Mexican land grant in the western Sacramento Valley, within present-day Solano County and Yolo County, California. It was given in 1842 by Governor Juan B. Alvarado to William Wolfskill.The grant extended along both banks of Putah Creek (formerly Rio Los Putos) and encompassed present day Winters. On current maps, the four leagues include 10,750 acres (43.5 km2) on the south side of Putah Creek in Solano County, and 7,005 acres (28.3 km2) on the north side of Putah Creek in Yolo County.

Sacramento Valley National Cemetery is a 561 acres (227 ha) United States National Cemetery located about 3 miles (4.8 km) southwest of Dixon, Solano County, California. The cemetery is intersected by the Union Pacific Railroad in the southeast of the cemetery. Opened for burials in 2006 with an initial 14 acres (5.7 ha) development, the Department of Veterans Affairs intends this site to serve needs for the next 50 years. The cemetery is the seventh national cemetery built in the state, and the 124th national cemetery built in the U.S.

The Nut Tree Railroad is a mini-railroad within the Nut Tree Plaza in Vacaville, California.

Nut Tree is a mixed-use development in Vacaville, California near the intersection of Interstate 80 and Interstate 505.

The Harbison House is an historically significant house on Monte Vista Avenue in Vacaville, California. The Harbison House was originally located on the Harbison Ranch, where the Nut Tree restaurant and roadside stop were located.

The Mission is a nondenominational apostolic Christian church in Vacaville, California.

The English Hills are a low mountain range in Solano County, California.The range runs along the southwestern edge of the Sacramento Valley. Vacaville is at their southern end.