It depends on where in Vallejo. Vallejo its a big city and with over a 100 thousand population. I just moved to Hiddenbrooke neighborhood and we forget so often to close our garage doors and doors, nothing to worry about really. People blow vallejo crime out of proportion. If you choose to live downtown vallejo, then yes, like many other big city downtown, crime is high. If you choose to live in hiddenbrooke, glencove and other nice neighborhoods outside downtown, you'll have nothing to worry about really. I was as scared as you before moving here. In hiddenbrooke, you have Dr's, lawyers, CFO's Nurses teachers, consultants, living here. Nothing to worry about!!!!